Sticky Light is a project by Alvaro Cassinelli, Kuribara Yusaku and Stephane Perrin of the Department of Information Physics and Computing at the Ishikawa Komuro Laboratory of the university of Tokyo. Indeed, this should already spark you interest.
Sticky Light is a 3d tracking technology using a laser diode (low power), a pair of steering mirrors and a single non-imaging photodetector. The big difference to other tracking technologies is the fact that the Sticky Light doesn’t use a camera or projector. So what could you do with? It can track the contour of objects and even augment real-time drawings. Or you could build games like air hockey or a pinball game. Or … just watch this video, after 2 minutes they show you the games demo.
Daito Manabe visited the lab recently and added some functionality to the system: sound. soundLight can now generate sounds based on the movement of the laser.