First impressions of Leap Motion
My big question is really a paraphrase of Douglas Adams -  Radio had advanced beyond touchscreen and into motion detection. 
  It meant you could control the radio with minimal effort 
  but had to sit annoyingly still if you wanted to keep 
  listening to the same channel.

I can see it working like the Kinect - really useful in a specific and narrow use case but there is a reason we use pens and not paint brushes for writing.  Similarly this does not seem like a tool that is easy to use for say to day tasks.If you have an informed (hands on) opinion to the contrary I would be very interested