I said before that I thought that the next important progression in the develop of touch-screen devices was the ability for the device to provide feedback.
Well, now that technology exists.
It just has to compete with brain-to-computer control.
Hop to it slackers. Someone write an app that takes a picture and then scans through images to find someone famous who looks like the person(s) in the photograph.
The perfect tool for compliment and insult slinging.
Go on, get coding already!