You make an interesting point which is certainly a great point for discussion.. but to be honest, my worst nightmare would be navigating around a frustrating OS like vista (one presumes windows 7 will be vista like also) with just my bare hands.
However, I understand your frustration with not being able to have an Apple touch screen computer, as they would probably make a kick-ass one. I have faith that Apple's product innovation is still there, especially with Johnny Ive around.