Microsoft Kinect is an extra bit of gadgetry that you attach to one's Xbox that does some cool things: it recognises your voice and it recognises that your movements. For non-gamers (eg me!), then this is a step-up from Wii - you have to hold a Wii to do the same thing. Have a look at MS's
Well, clever geeks have taken this on board and created some pretty cool computer interactions.
My favourite is the Swim Browser (see the video), which describes itself as hands-free browser. (Translation: a browser that allows you to surf the web by waving your hands around). It was the winner of 2011 PrimeSense/OpenNI developer challenge, so err..., other people think it's good too.
I sense that we are only at the beginning of this....