The first is a gesture-based device called Leap Motion. “The Most Important New Technology Since The Smart Phone” screams the headline in MIT’s Technology Review. It’s coming this December, it plugs into your computer, and if you’ve seen the movie “Minority Report” you already know how it works: lift your hand in front of the screen, flick it this way and that, and control your virtual environment as effortlessly as you control the hand itself.

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