Was thinking of posting this.
Honestly Apple's successes lie on the interface and intuitiveness of their devices. This is something people still don't get.
It reminds me of when people question Nintendo's successes which is usually caused by their first party software.
Having a "full blown OS", "more power", "OLED", and "Wacom capabilities" is shit that nobody in the general public cares about. The most important things to the general public is how much a product appeals to them and how much they enjoy it. And the look (interface) and feel (intuitiveness) of the device are key for that. And Apple knows this.
There were touch screen smart phones that, on paper, were superior to the iPhone in every way prior to its release. There were MP3 players with much more space and better sound quality than the iPod before its release. Yet two products stood above all of the others in their competitive field for the same two reasons why the iPad will most likely stand alone in its own.
EDIT - And again as said before both the iPod and iPhone weren't what they were now when they first launched they took time to build up. Wait a year or two when Apple adds in multitasking, further modifies the software, puts on an anti-glare screen, adds a webcam, and drops the price this thing will (most likely) follow the course built on by their previous successful efforts.