What a stupid idea...well, yes and no.
Another thought-provoking article on AppleMatters.com. He's right, but...there's a major problem with this idea. If the metaphor is unusable, then the device is, perhaps, non-intuitive. I know a 70-year-old lady who does amazingly well with Windows. Why? Because, she's been able to wrap her head around the metaphor. Most older people can't. I agree that computing will be very different in 25 years, and perhaps easier to support. But, we live here and now--and I don't want to have to wait that long to make computers accessible to the masses. Do you?