"Introduced multitouch on iPhone, what about for the Mac?"
Steve: "Makes sense for the iPhone, not sure it makes sense in the Mac. Classify that as a research project."
Honestly a multitouch iMac wouldn't be that useful if you use the demo iPhones at the Apple Store you see how they are unresponsive compared to using a mouse, trackpad or keyboard, even bluetooth. Also there will be limited use and hard on the hand... No real benefit with the current technology, yet... The iPhone is a better use of the technology just because it helps maximize screen use and functionally but it is a technology that still needs some cleanup work.