Gesture recognition from wearables

I'm sitting waiting for Nicola to turn up to discuss some iPad stuff.

Over Christmas I wondered about creating a wearable which could act as a mobile surface - you could drag and used gestures on any object. This could be combined with a projector to make a multi touch table from anything or have other uses.

Came across this Korean wearable work (see link) Recognizing Hand Gestures using Wrist Shapes. . They use IR optic sensor to detect tendon movement. And a neural network to interpret the gestures.I like the idea of reaching further into the surface of the body to pick up more information t