If you sit experts in separate rooms and give them the same problems, often they will converge to the same solution. Whether that is due to physical limitations, mathematical or statistical considerations, the current state of the market, what have you.<p>There are a lot of narrow physical constraints operating in this market: the size of the human hand, the size of a fingertip, the range of human vision, the distance from the eye to the screen in terms of arm's length. There are other technology givens like the resolution of a screen that fits in the hand and the precision of touch technology. There are cultural givens to pull something apart to stretch it or push it together to make it smaller, or to advance a view by turning a page.<p>The more you think about these problems, the more you realize how narrow the space for innovation was in them, and in fact how many of Apple's innovations were anticipated by the market. Apple got there first with the whole package and reaped the benefits in mindshare. But they shouldn't be able to seek rent on a solution that experts would create in a vacuum.