Why no desktop linux? Both ATI and nvidia have pretty good drivers, and even the open source options aren't bad for basic desktop use, at least for older cards.
In fact, ati's drivers have been better in linux lately (for me) than nvidia's.
Well, you're the first person I've ever run across who was able to play hardware accelerated blu-ray content, not have Flash video flickering and tearing, encounter no problems in Wine while all effects in Compiz and KWin function. Oh, and have suspend-to-ram resume reliably. While TV-out is enabled for bonus points. Iconifying windows in less than a second without having to patch or use a downrev X server would be nice too.
The above is not a pipe dream for an 8800GT with the nvidia jurassic-185 blob versions (haven't tried the 192 yet).
When I last tried fglrx (9.11, not sure if there's anything newer) it was still awful. I fired up Oblivion and everyone was black. Eve had random white icons and other weirdness. Locked up X after tabbing out to a text console. Locked up X after enabling/disabling KWin effects. Locked up X after S3 resume.
The radeon open source driver works with KMS, but is barely usable for basic 3d desktop effects and forget wine. Power management on either? Good luck, although it's being worked on in the open source driver as we speak. Video playback is CPU only unless you have the 4 series, not too demanding content and aren't very picky about your red being red and green being green instead of vice versa.
There's more to desktop Linux than functioning in basic framebuffer mode. I don't consider feature parity with a Trident 8900 suitable for a modern desktop machine.