Carnegie Mellon University graduate student Chris Harrison has created a system that uses a pico projector and vibration sensors to turn a user's arm or hand into a keyboard fit for a mobile device. Microsoft is working with Harrison on the product, called Skinput, but expects it won't be commercially available for at least a few years. "People don't love the iPhone keyboard. They use them. But they don't love them," Harrison said. "If you could make the iPhone keyboard as big as an arm -- that would be huge."
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