... better OS for most people (not you, not me, but most people), better security (via OS's that allow apps to do very little and have no low-level access... which also increases reliability), the ability to be used standing, in a weird spot, etc. because the UIs don't need pointing devices or keyboards. The "convertable" PCs were actually an excellent idea, but they were too expensive to catch on... if someone brings them to iPad or netbook pricing, then I'd expect them to catch on well.

J.Ja