When you go to a restaurant in the near future, you might order your food by poking at icons on your table -- they'll vanish when the plates arrive, and spilled drinks won't do them any harm. Light Blue Optics's pico projector is the first to turn any flat surface into a computer touchscreen. It beams a 10-inch display, which can show photos, videos, Web sites or apps running on its simple interface, and uses an infrared sensor to track your fingers' movements. Done browsing? Tap a virtual off button to make the screen disappear.
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