richard marks just showed a couple motion tracking demos they developed for eye toys. google has images. some of the demos were so awesome that it drew loud cheering from this jaded crowd. farther out are sensors with depth detection which allows to have truly 3D integration, where you can “reach out” to interact with the system. the demo shows butterflies circling around a guy as he walks in front of the camera. this is truly awesome. also, for the DDR crowd, it now supports eye toys.