I agree with the paragraph around technical difference versus todays choices and hope cost becomes a differentiator, in this case. However once you go beyond a single core and few gigs RAM, surely its a hard differentiator to achieve, as we're talking raw computing power and cost to supply.
The only reason I'd be interested is if it means I can ditch windows for everything but the Office suite.
You still need some sort of a computer at home to use your cloud PC. And guess what, most people will still buy a PC once they estimate the pricing. Not worth it, world today is full of crappy ideas that don't actually work.