Chrome and Win8RT are the only OSes that are good for an ARM-based notebook form-factor, and the ARM chip is necessary to make this device not suck at this end of the cost spectrum.
That and frankly, I think we're all sick of supporting Grandma's windows machine, so getting computer-illiterate people onto a "web-only" device is great.
I won't buy one, I don't need one, but I can see the niches it fills.