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It's a startling technology that uses a small projector and a depth-sensitive camera to project a user interface onto a wall, your hand, or anything at all and let a user interact with it.
Now you don't even need to go through the trouble of taking your phone out of your pocket to dial a number.
(The drawback is that you have to wear a big camera pack on your shoulder, making the technology vastly more cumbersome than an actual touchscreen.)
Chris Harrison, a researcher at Microsoft, calls this a "mega Kinect hack."
