Considering how long the Nintendo DS has been around and how unbelievable successful it's been, it really surprises me that we haven't seen this for computers already! It seems like such an obvious advancement and for me it would finally make the touchpad usefull since I despise them at present. I for one can't stand touchpads and won't purchase a laptop unless it has a touchpoint which really limits my options... This may change my oppinion of them.

Check the source for a video.