Take a look at the G-speak spatial operating environment by Oblong.
Some of the SOE's core ideas are already familiar from the film Minority Report, whose characters performed forensic analysis using massive, gesturally driven displays. The similarity is no coincidence: one of Oblong's founders served as science advisor to Minority Report and based the design of those scenes directly on his earlier work at MIT.
It sure looks cool, but personally I don't understand the advantages of this system over typing or using a mouse. Link -Thanks, carfeimao!