I'm about to buy a new system.
I'll buy from the company that gives best linux support.
If AMD confirms open-sourcing the specs of latest GPU for having open-source drivers, I therefore don't mind waiting a little to have the drivers. I also don't mind spending more bucks in acquiring ATI products. I don't even mind losing some FPS versus a cost-equivalent nvidia GPU.
But i don't mind on those points only if there is real open-source support, as ATI said. A full release of GPU specs, even from the latest GPU, both 2D and 3D.
If not, I'll go for nvidia, since, for the moment, is less expensive for better performance.
I feel confident that the community will be able, at the dire end, to best tweak the GPU performance as it would never been done with binary blobs. Just have to the phoronix test of open-source drivers .vs. binary ones. On ETQW, the performances are far better with open-source. And I don't want either my hardware to be dependent on the "goodwill" for writing good drivers from any manufacturer.