I am running SteamOS on Zotac NEN with currently 39 AAA games and frankly barely spend any time on Windows for gaming, and prefer buying games that have announced SteamOS support. I also have Win 7 & Win 10 on that computer just in case I need it for Uplay/Origin stuff or DX12-only (1TB M.2 SSD with 500GB for SteamOS, 250GB for either Win 7 and Win 10 and 2TB HDD for storage). Surprisingly, everything works just fine (I had one complete freeze in the past few months). It can work nicely even in 4K in Tomb Raider, GRID Autosport or Metro, though on lower details. Frankly, I know I can get 25% more fps on Windows, but what difference would it make for me to run GRID at 120fps when it runs on 90fps already? And Linux can only get better so why sticking to Windows?