I found this online, actually I was tipped off by a friend in the USA. This is a new gadget from Leap Motion which looks very cool indeed.
I have pre-ordered one and will review the product when it arrives. Expected Feb 2013 so watch this space.
Essentially it works similarly to the game controller Xbox Connect, but the resolution is much higher, giving very accurate control. It will sit under your monitor and allow you to control your PC with hand gestures in the air.