This seems like a very cool technology. You have a top layer work surface that is semi transperent so you can see another layer beneath it, which is another desk top much like a dual monitor yet in a single frame. You could be working on a spread sheet on the top layer a word document would be displayed in the lower layer, or a DVD may be playing in the lower layer. Apperently it can be used to render 3D depth to game imaging as well. It does it by actually stacking 2 LCD screens on top of each other. I would certainly like to see one in action.
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