The Hitachi CP-A100 ultra short throw projector here is rigged up to a touch-motion interface. Sitting at the edge of the table with a lens mounted about 15 inches from the screen, casting a 50" diagonal picture, in this case, a computer screen showing Google Earth. Tabletop applications are only the beginning—the XGA LCD-based projector casts a 120" screen from just three feet away. [Hitachi]

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