Despite only just releasing the SDK for their multitouch Surface table, Microsoft have already updated the system with a second layer
of projection functionality. As well as the current projected display, the new SecondLight Surface is capable of throwing a second image onto any translucent material - for instance a piece of paper - held above the table. Developed by the company's Cambridge, UK research arm, SecondLight can be used to display, say, an image of a car on the table-top together with a moveable cutaway schematic on a handheld screen held above.
Check out the video demo of SecondLight Surface after the cut