[netfire]

While waving your hand in front of a monitor looks pretty cool, its definitely not going to work well for most work or extended use. Also, I think the reason touch-based devices have caught on so well is that we like the tactile feedback of dragging our finger across a defined plane.

I'd be interested to see what you could do if you projected an image onto a work surface to make that more interactive. Seems like it would be easier to draw or manipulate 2D things on a plane rather than trying to wave your hand in 3D space. (Image Manipulation, Graphic Editing, Maps, etc)