Novell's got commercial desktop, and has team doing ATI RadeonHD driver.
Intel use Linux internally for CAD, presumably they would tend to use lots of integrated graphics, but at least they have worked to update the video stack.
With X & KMS, plus improved graphics memory management technologies, it seems churlish to expect non-glitchy 3D in releases made less than 8 weeks after new kernel version.
If they bugs stay unfixed, in 3 or 4 months, then I'll really start to be concerned.
Reality is, most users go get the blobs from Nvidia & ATI/AMD with Nvidia rated as less trouble because it installs more reliably.