Ergonomics. The biggest problem with mobile tools right now is that they’re hard to use — the keyboards and screens are just small.

It’s worse for someone like me who is 6′4″ and has the hands and fingers to match. Little keyboards and me do not get along.

The iPhone was a step in the right direction. By combining screen and keyboard, they made both better.

But that doesn’t change the fact that we want more space out of a smaller package. Solve that problem and you’ll rule the market.