kylevh writes "On one side, there are the people who think that a traditional GUI—one built on windows, folders and the old desktop metaphor—is the only way to go for a tablet. In another camp, there are the ones who are dreaming about magic 3D interfaces and other experimental stuff, thinking that Apple would come up with a wondrous new interface that nobody can imagine now, one that will bring universal love, world peace and pancakes for everyone. Both camps are wrong: The iPhone started a UI revolution, and the tablet is just step two. Here's why."
There are lots of cool UI ideas in there, even if it is entirely speculation. It's worth a read just to think about what the future could be like.