I think the world though kind of looks like Oblivion though from the screen shots, like they used the same textures or something for their far-away lands and grass. Trees too. But it still looks amazing, I'm really looking forward to giving it a go. And it looks true, the people in the game look a LOT more detailed than in Oblivion. yay!
I can't wait for better Vista drivers for the 8800 so it will really shine.