Several years ago, we saw a demonstration of interactive technology that allows users to wave their arms and change images on screen as a result. We could immediately see how intuitive it could be, and how it would make a touchscreen even better. 

Now Microsoft are demonstrating  what they've done with this technology since then, and it does look sexy. Particulalry when it promises to convert an ordinary surface to a touchscreen. There's a great write up, photos and video of it all in action here.

Who needs to click with a mouse when you can simply wave your arms around.