It's not a good sign that the best people can say about the iPad is that their mom could probably get by with one, even though they would never use it.
We've been hearing that refrain for decades, and it's never worked out in the marketplace. People who don't care about technology want to spend the least possible to get a fully-capable product. They want one computer that does everything and lasts forever - not a niche device that has to be tethered to a real PC anyway.
The Wii is a poor example because it didn't succeed by being simpler - it sold by offering a compelling gimmick and content that was not available on other platforms, for an underserved market of children and baby-boomers. The iPad doesn't offer any content you can't find elsewhere, and the 'touch' interface is one that's failed to find a significant market in full-sized computers for over twenty years.
They want one computer that does everything and lasts forever - not a niche device that has to be tethered to a real PC anyway.
Yeah, that's a lot closer to describing my mom - housewive all her life, approaching 70 - but since the kids left home she has gotten one laptop after another, and her use is actually quite sophisticated by now - certainly beyond "browser only". I did give her an iPod touch but her only interest in it is inflicting pictures of her grandchildren on innocent civilians while she's out on the town - she uses her laptop for everything else. She has no particular interest in spending money on something like a tablet.
And don't forget the generational thing too - I'm going to be the mythical "grandma" one day, and when I retire and have an empty nest I am going to tweak my gentoo box all day long :-)