What's the situation regarding the 64bit executable?

[Buchon]

Originally Posted by speculum jockey

I'd like DirectX 11 up and running before they even start to worry about the 64bit exe. From what I have heard and read, DX11 is a much more efficient version that DX10 is and this will usually result in better performance with the same or even more eye-candy enabled. (confirm/deny)

DX11 contain AA processing optimizations, witch mean better performance with AA enabled and use better HDR precision witch mean better HDR lighting.

Also can do high quality shadows processing without performance loss (no aliased shadows)