Oleg says that Storm of War will use DX9, DX10 and DX11 rendering capabilities. That sounds pretty fantastic to me. There are some great possibilities included there.
Personally I'll be waiting to see what all comes of it and maybe in a couple of years I'll build a new system. I wouldn't rush out to buy one of the early DX11 cards just yet.
On the other hand if you just have to have the best thing running right now... then go nuts
