as far as i understand, it is about specific game and performance related tweaks in the kernel. so it goes beyond just a distribution where you just string together few programs, desktop environment and some config files and call it a day.

this is why linux, after all, is still where it was 20 years ago. all those endless distributions and fragmentation make it non-competitive against the mainstream desktop operating systems. ubuntu was doing good work by becoming the de facto desktop linux by sheer branding. but they dropped the ball really hard and that opportunity to make linux desktop a serious competition is gone. now games are leading the way so maybe steam os or one of these gaming-tuned distros might pick up the momentum.