You can still achieve amazing graphics with DX9 (yeah, i mean Crysis
). I don't see any reason for the devs to take full advantage of DX11. Tesselation is great BUT it will have major performance hit (as we've seen). So basically, DX11 won't really take off untill the next gen of GPU's. As it is right now, DX11 is a gimmick feature and nothing more!