It was predictable and it's starting to happen: Dell and other major actors will soon start to put pressure on manufacturers to get better drivers for Linux.
Dell on better ATI drivers:
Google on open-source ATI/Nvidia drivers:
In the meantime I'm buying a computer and I chose Dell and Intel (no ATI, no Nvidia and no AMD because of their link with ATI and the involvment of Intel in various open-source projects). A lot of people put pressure on these manufacturers, now is the time that industry leaders do the same.