Holographic Keyboards

While typing on a full-sized keyboard is nice, no one wants to carry one around with their handheld. What if your keyboard could be completely virtual?

HoloTouch, Inc. has developed a holographic keyboard, a 3D image of a keyboard that can float in the air in front of the user. An infrared detector scans the plane of the holographic image to detect which number or symbol is being "touched."
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