Ati have afaik 2 different graphic cards, Radeon line and FireGL line. The new FireGL cards make use of directx 10 and shader model 4 and seem to be not that different from Radeon cards (im no expert though).
Now, I understand that with Directx 10 you now have unified shaders. I think i read that firegl was optimized for vertex shaders and radeon for pixel shaders.
Unified shader model - Wikipedia, the free encyclopedia
So, I cant help wonder if there will be or could be a single driver that could work with either firegl or radeon.
Would it be too much to hope for you think?