They look fake to me, not making any assumptions though.
EDIT: Just read that some guy posted them on Bnet and got insta-perma-banned and his thread got insta-locked. Kind of making me think it's the real deal.
If those are real, then it looks like they're finally making the jump into *actual* next-gen graphics. If they bring the framerate up to 60 FPS, I'll be so freaking happy.