Comment by GuB-42

This is kind of a niche problem. It only affects people with AMD GPUs running games at over 4k60 with HDMI. Get an NVidia or stay at 60 FPS or stay at 1080p or use DisplayPort and you will be fine.

It is not really a roadblock, more like a bump, and it is not the only bump by far. Some games just don't run on Linux, or quite terribly and they don't have a big enough community for people to care. Sometimes one of your pieces of hardware, maybe an exotic controller, doesn't like linux. Sometimes it is not the fault of the game at all, but you want to do something else with that PC and it isn't supported on Linux, and you don't want to dual boot. Overall, you will have less problems with gaming on Windows, especially if you don't really enjoy a trip to stackoverflow and the command line, but except for anti-cheat maybe, there is no "big" reasons, just a lot of small ones.

And sure, it is improving.