The camera works by translating hand and body motions into an avatar's movements in Second Life. Tip a bit forward and the avatar will walk, tip faster and the avatar will run, tip too fast and you'll fall down (presumably). The included demo also shows the camera translating various movements into jumping, flying and landing "gracefully."
Low-priced 3D cameras, such as the Zcam, will not only make playing Second Life more immersive than other peripherals out there , it'll also completely rethink human-computer interactions, Kapor said.
Well, we'll see about that. All I know is, if years from now I'm suddenly standing in a Los Angeles parking lot half naked and swinging away at things with my katana thanks to a particularly crazy bar fight in a virtual reality world - I'll know who to blame. [New York Times]