The way things are done these days, porting to PC from console thus dumbing it down, we will not see the advantages of DX 11 for a very long time. Just take a look at the recent past. The best anyone has been able to do for DX 10 is Crysis. That was imo a good effort but it was still a long way off it's potential.
Also look at Ubisofts implementation then retraction of DX 10.1. Sorry to say but all this new tech is a non issue when it all comes down to money. That is the way it is going to be from now on.
-Rampage- Motherboard: Asus Rampage Formula CPU: Q6600 @ 3.2Ghz Cooling: OCZ Vendetta 2 Ram: 4GB OCZ Reaper HPC PC2-8500 5-5-5-15 @ 540Mhz Video Card: Sapphire Radeon HD 5870 Storage: Seagate Barracuda 7200.10 320GB/4x 500GB Barracuda 7200.11 Raid 0 Power Supply: PC P&C Silencer 750 Quad Case: Antec P180B Monitor: Syncmaster 245T OS: Vista 64bit