New Laser Tech Lets You Write On Air - No Gloves

A prototype of a "Smart Laser Scanner" developed by Alvaro Cassinelli and fellow propellerheads at the University of Tokyo enables you to simply write with your finger on a wall or any other surface -- even in MID-AIR -- and what you write will hang there as light. The system, which uses laser beams, mirrors and sophisticated software, follows your finger wherever it goes, shining light on it -- and remembering where it traveled. Cassinelli says the technology could be built into a tiny chip and embedded in a cell phone. I want one.