The best article so far on the iPad’s impact; by Dan Moren in Macworld:

Like hot rodders, techies wear their tweaks and optimizations as badges of honor. To me, that’s the chief distinction between power users and your average user: power users adapt computers to the way they work, instead of adapting the way they work to computers.

Money quote:

Much of the negative response to the iPad seems filled with anger—which, as Yoda adroitly pointed out, stems from fear—and it mostly comes from the kind of power users who like dealing with the underpinnings.

For a few decades personal computing has been mostly an evolution. Touch is the revolution.