Microsoft recently introduced its new, lower cost touchscreen setup dubbed TouchWall, and it is considerably cheaper than its previous Surface table (which was around $10k). The TouchWall utilizes 3 IR lasers and a IR camera to scan for multiple point touches, a 4×6 Plexiglas sheet, and a rear projector. The demo shown uses a basic Vista PC running Plex software for the interface, and the price for the setup is only in the 100's of dollars
The TouchWall will allow you to scroll, zoom, control various program functions, and draw on the screen (think giant electronic whiteboard). Interestingly, Microsoft is apparently not pursuing the TouchWall as a commercial product (maybe considering it a threat to the more expensive Surface Table?).
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