Both Netflix and Amazon stream in 4K. Cameras like the Sony a7S and the Panasonic Lumix GH4 can shoot in 4K. Even smartphones have been getting in on the act, with handsets like the LG G Pro 2 and Sony Xperia Z2 capable of recording 4K video. So with the amount of 4K content available increasing every day, you may have been thinking about buying a 4K set so you too can bask in the glow of 3,840 x 2,160 resolution. But 4K sets don't come cheap, and you're going to want to do a bit of research before dropping that much cash. While we don't really review televisions here at Engadget, we've done the next best thing, compiling the opinions of trusted critics from across the web. Which set offers you the most bang for your buck? Do bells and whistles like a curved screen make a difference? Check out a few members of the 4K Class of 2014 below.

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A year later, and strangers still ask.

"Is that the Lumia with the crazy camera? How do you like it?"

And, after a year, I still offer up the same basic response.

"Great camera, solid phone."

But after 12 months, and with a slew of new handsets on the way, it's time to reevaluate if my bright yellow Lumia 1020 is still the best choice as my daily driver. Is being great good enough?

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Later this month, Cathay Pacific's 747 will fly from San Francisco to Hong Kong for the very last time. It's a story we're hearing from nearly every airline still flying the most recognizable passenger jet in aviation history -- rising fuel costs are prompting carriers to ground their fleets, opting to shuttle passengers in more modern (and efficient) airliners instead. Hundreds of 747s still take to the skies every day, but their numbers are dwindling, with Boeing's 777-300ER and 787 Dreamliner, as well as the enormous Airbus A380, picking up the slack. The flagships of yesteryear now litter the desert, with several sites in California serving as a permanent resting place for the plane that was once known as the Queen of the Skies, the Boeing 747-400.

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How a keyboard case can turn your 8-inch tablet into a productivity machine

What's up with 8-inch tablets? Microsoft reportedly canceled the Surface Mini at the last minute. Samsung's Galaxy Note 8.0 is long overdue for a refresh. Even the current class leader, the iPad mini, only came about after years of procrastination at Apple. Perhaps it's just a little harder to convince people of the merits of this category of device, compared to the greater pocketability of a phablet, the affordability of a 7-inch Android slate or the extra productivity offered by a full-sized tablet, hybrid or laptop. However, I'm happy to report that with a bit of smart accessorizing -- namely, the addition of a high-quality keyboard case that allows for proper touch-typing -- an 8-inch tablet has plenty of scope to operate as a serious productivity tool, if not an outright laptop replacement.

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Look, there aren't many things which can truly impress New Yorkers. Yet, somehow, the Mini Countryman pictured above managed to make quite a few heads turn during a drive across Manhattan. Whatever it may have been, it's safe to bet those bright red colors draping the car had something to do with it -- and the not-so-subtle branding didn't hurt its chances to impress, either. Regardless, this Manchester United-themed vehicle is part of a full fleet of 20 vehicles, one for each Premier League team, that NBC Sports and Uber will have cruising around Manhattan through this Sunday. The free rides (up to a 30-minute drive) are obviously being used as a way to promote the start of the EPL season on NBC Sports Network here in the US, which kicks off on Saturday, August 16th. Uber, for its part, isn't new to having bizarre rides hit the streets, like the time-traveling DeLorean and, of course, those beloved Ice Cream trucks. Now we can add this one to the list.

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Ever since the original Moto RAZR V3 came out 10 years ago, the smartphone industry has had a strange obsession with skinny phones. Not because shaving a millimeter or two off a device will give it more functionality, but because it's an effective marketing tactic. In emerging markets in particular, slimmer phones at slimmer prices enjoy a distinct advantage. Gionee, a handset maker based in China, isn't very well known, but it's looking to make a name for itself with devices like the $375 Elife S5.5. At 5.55mm thick, this svelte beauty currently claims the title for the thinnest smartphone on the market. To put that in perspective, that's a full two millimeters skinnier than the iPhone 5s. I spent a few days with the device to see if thinner really is better.

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Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green.

This week, Tesla CEO Elon Musk announced that the automaker would deliver 100,000 electric vehicles in 2015. That's a big jump up from the 22,000 EVs the company currently produces, and the news sent Tesla's stock soaring. In other green transportation news, the Texas Central Railway is planning to develop a 200MPH bullet train that will connect Houston to Dallas. The project is expected to cost about $10 billion, and it will be funded entirely with private money.

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I've always thought it's better to spend more on something once than to buy cheap and replace time and again. Because of this, I've owned exactly two bags in the last nine years: a Wenger Soho backpack and now a custom, $184 Timbuk2 Laptop Messenger. Last spring I decided it was time to retire the trusty Wenger that got me through college and my first three E3s for something a little more modern.

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Ever looked into a kaleidoscope and wished you could just climb right inside? Well, unless you were willing to sip from the ayahuasca cup, you were fresh outta luck -- until now. The installation you see above is a project by Masakazu Shirane and Saya Miyazaki called "Wink," their entry into Kobe Biennial's Art Container Contest. The kaleidoscope concept uses mirrors (in keeping with Sir David Brewster's classic), but is also held together by zippers. Shirane and Miyazaki claim this makes it the first "architecture" based on zippers; proving you can create an adaptable, reconfigurable space using the same tech found in your pants. The installation -- housed inside a shipping container -- isn't all about dazzling mirrors, either. The duo claim it has eco-implications too. "This idea could solve global environmental problems, because it is easy to exchange only a part with a zipper."

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A lot has changed in the three years since IBM first unveiled a prototype of its human brain-inspired SyNAPSE (Systems of Neuromorphic Adaptive Plastic Scalable Electronics) chip. That single-core prototype has now been significantly scaled up, leading to a new, production-ready SyNAPSE chip that blows past its predecessor with 1 million neurons, 256 million synapses and 4,096 neurosynaptic cores, all the while only requiring 70mW of power. Though the numbers are impressive, it's what they translate to that holds even greater prominence: the ability for devices to process various sensory data in parallel just like the human brain, by merging memory and computing.

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