Microsoft says 60% of Microsoft PCs still have Windows xp,and it's a big demographic to left out.
Wrong.
XP usage share is at around 44% (compared to around 40% for Vista + 7), and the majority of XP's current share is comprised of businesses. That number is going to drop
very quickly this year; especially after Windows 7 Service Pack 1 is released (which is apparently going to be next Tuesday). Please, let's stop this "everyone still uses XP" myth. They don't. There's enough evidence out there to suggest that the majority of people who actually play games don't use it anyway.
Anyway, I think it will be quite absurd for them to not support at least DirectX 10. I'll be really surprised too, given that Bethesda likes to be cutting edge and all that. I just can't see them not even doing
that. It's 2011; there's no reason for the game to look like it was released years ago, and I just don't see a company such as Bethesda rejecting current technology for any reason, as it wouldn't be good for their image. It's not like they necessarily have to drop XP support.
But mostly, I want to see DX11 tessellation on all those purdy mountains we know are going to be in the game.