yeah, what sucks with current DX10 games is that they often times look just fine on DX9. the improvement is occasionally noticeable, but its not something you're going to notice in the middle of a firefight on Crysis. that's why i can't get too excited about DX11's "better graphics capability".
the good news is that with DX11, your graphics card basically becomes a separate processor entirely that can be used for a lot more than graphics. good call by Microsoft to recognize that the CPU isn't the only hardware element that is capable of making calculations, especially given how powerful video cards are becoming.
i can't say that i'm excited about it, but its interesting nonetheless.
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind