Many if not most of the special-purpose objects around us are going to be replaced by apps running on tablets. This is already clear in cases like GPSes, music players, and cameras. But I think it will surprise people how many things are going to get replaced. We funded one startup that’s replacing keys. The fact that you can change font sizes easily means the iPad effectively replaces reading glasses. I wouldn’t be surprised if by playing some clever tricks with the accelerometer you could even replace the bathroom scale.
Y Combinator’s Paul Graham – Tablets