IMO the biggest hurdle for a wider adoption, especially on laptops.
Feature-wise, the drivers are usable as they are, nevermind the performance delta with fglrx in 3D applications, that can come later.
You'd expect people who are serious about 3D performance to be able to install a driver. Otherwise, in my opinion: GTFO.
P.S.: I've just read about LG having signed a deal with MS for the "privilege" of using Android, so I'm in a bad mood.