If just most games wold run on Linux out of box at least same as on Windows, i can imagine there would be shift in market share.
You could argue that this is somewhat true by looking at the protondb numbers for the top 1000 games. 88% of the games are silver rated or better and the majority of those 12% games are competitive multiplayer titles with weird/invasive anti cheats.
It seems your igpu is being used instead of the dGPU