I think there is a big difference betweened dumbed down and well designed. The MacOS and especially OSX are incredibly well designed. You don't have to dig to far to get to UNIX in OS X (just open the terminal), but the point is, you don't have to if you don't want to.
That's not dumbed down, it's just logical. Isn't that the main goal behind KDE and GNOME?
No reason to be so eletis, just because it has pictures dosn't make it stupid. In the end, it maintains all of the necissary functionality and then some.