Gizmodo has an amazing video taken from YouTube of a technology developed at Microsoft called TouchLight. The video shows engineers playing around with some simple applications of this cousin-to-touchscreen technology. The precogs that run the system can't quite be made out in the video, though. Now if only we can figure out how to print onto wooden balls instead of paper...
http://www.gizmodo.com/gadgets/microsoft/microsoft-touchlight-touch-screen-technology-with-a-twist-194560.php