"GN: Will the PC version support DirectX 11?
Todd Howard: Yes, but I guess the real question here is do we take advantage of DX11's big new features and the answer is 'not specifically'. Our graphics work centers around doing things that will look the same regardless of platform, and sometimes that implementation will be different on the 360, PS3, and PC. "
Well, atleast it will support it, so I guess modders can take advantage of it if bethesda feel they dont want to... which I personally think is a bit stupid because they'd win the PC gamers loyality big time if they did!