Pretty solid sales figures, and I think they are set to increase over Christmas. Maybe I am too close to the developer community, but, like the Kindle, this is selling like hotcakes and cannot be ignored.
I think the sweet spot they have is a remarkable price, for pretty good software. WinRT is not as polished yet, but no doubt will be but is still a high class object. I think Microsoft is taking a gamble in competing with Apple, and having no low end option.
I wouldn't hesitate to get my nephew and niece one of these for the price, and I know they won't complain too much either about the apps, looks or features.