The potential for a big flop is that instead of buying a PC to replace that aging XP box, the customer will just buy an iPad.

"Hey, look, there's a Windows iPad too. I liked my Windows computer before it just wouldn't turn on anymore, I should try one of those."

People are moving to smart phones and tablets anyway. Not because Windows has changed too much, just because they're easier and more convenient.And that's why we have Metro: if Microsoft doesn't follow their customers they're going to lose them.

Bingo. I think this could be a huge threat to Microsoft in enterprise use. What happens when ISVs decide to just target web apps rather than rewrite to Windows Runtime?

heh funny you say that, I do some residential work on the side and lately every time i tell a customer it's time for a new laptop, a good 90% ask "what about an ipad?"