A follow-up piece on the PowerBook and iBook families might be needed, as the previous post indicates.
The designs of these laptops are light-years ahead of the Wintel side, and not just because of their size.
The materials used are as important, as are the location of the ports on the sides, the tactile feel of the aluminum keys on the PBs, the lighted keyboards, the widescreen format, and so on.
One criticism of the iBooks, though, is that the lettering on the keys fades after a fair amount of typing, from what I've seen among my friends.
Great Design: Apple gets it...Others Don't