Biggest overstatement. Linux gaming, though becoming more possible, is nowhere near gaming on windows. Forget game availability, even most GPUs are not properly supported on most Linuxes.
Rapidly? How long since ATI/AMD has been talking about improving their drivers? A decade? No, if history is in any way predicting the future then these talks are completely hollow.
I've been hearing some variations on "getting better any time now" since about 2003. Stop trying to make the Linux Desktop happen. It's not going to happen. In fact, if you stop making it happen, maybe it will finally stabilise enough that it actually happens.