stumbled upon a video of project glass (augmented reality), looks like it becomes fun to wear some glasses 
looks pretty similar to the magic that comes when you can manage the touch events in all the things you can really touch..
Touché: Enhancing Touch Interaction on Humans, Screens, Liquids, and Everyday Objects - YouTube touchè tells that you can use whichever materials (also non conductive) with human hands.finger.knees.. etc