Possible...win8 has never really gotten off the ground, I guess it never will.
Mind you I don't think it's games favouring nVidia, rather the other way around: nV going out of their way to get games working, even early ones.
I've seen heaps of driver problems while I was using an ati xfire setup for a year. Stupid stuff that could have been easily avoided by Ati's driver department. Stuff that somehow got through the testing, and got fixed in the next release; but also things like the inability to do bezel correction if your monitors weren't the _exact_ same, that never got fixed even though it came back regularly online. Plus the micro-stutter; it was really bad.
Some people also hinted that if you want to use ati, you should also use amd cpu, they like to work better (I had an intel cpu). Anecdotal evidence supporting it, mind you. Not sure if this is just wishful thinking, but interesting thought, nonetheless.
I've given up on Ati for a lifetime after that year. I'm happy to pay the "nVidia tax" for the better driver support