Leap Motion is a USB gesture control device you can connect to a computer which behaves much like a mouse or trackpad but in 3 dimensions. Available July 2013 for public release (you can pre-order if you like @
https://www.leapmotion.com/). It's noted for it's accuracy and response to finger gestures and it's compatibility with major platforms.
The following videos were shown to me by a colleague at work. I was so impressed I just had to post them. So here's a screenshot, read more if you want the videos:
So Leap in Motion AR Drone:
{youtube}ZOdxlrQj_ZU{/youtube}
Just as amazing but old news:
{youtube}L75ESD9PBO{/youtube}
Swarm of Nano Quadrotors:
{youtube}6lCUGPixEnk{/youtube}
DigitalTrend's video on Leap Motion:
{youtube}TMqBLqzsZZU{/youtube}
...Obviously just youtube the above but you get what I mean. Absolutely brilliant!