The question you (and anybody else, including me, of course) should ask yourself is if you are able to create current-gen or even previous-gen quality of games.
YES WE CAN!!!!!
For my game-project one of the biggest problems is the sorting of semi-transparent polygons.
They are not sorted correctly in A8 (DirectX 9), and doing some workarounds to prevent this problem is very complicated and time consuming.
But DirectX 11 supports 'Order Independent Transparency'.
Therefore the problem of wrong sorted semi-transparent polygons would be solved with DirectX 11.
Look here:
http://www.youtube.com/watch?v=zANEUhyT2y8