If AMD released decent Linux drivers I might consider it over an Nvidia card, but as things stand now they're useless in a Linux box, and useless in a Windows box (but that's just because it's windows)
Care to expand on that? You do realize that Windows dominates the gaming market, right? (and don't respond with anything involving mobile please).
My interest is in machine learning, so I would like to see decent Linux drivers and more work on the OpenCL environment.