> Usually when stuff breaks in the NVidia drivers, it's because of a combination of a kernel update and sloppy package management by the distribution. None of this should be an issue if Valve decides to release some kind of Linux based 'Steam loader' that boots directly to the game itself, or make their own Linux distro with tight control over the kernel and GPU drivers.

I'd say the best option here is to work with Canonical to make Ubuntu a stable gaming platform. Valve has the gaming expertise and Canonical has the Linux expertise and community mindshare, so I could definitely see them working it out.