Source is this video:
Windows Was The Problem All Along - Dave2D
We could obviously compare performance between windows and steamOS before on the steam deck, or between windows and Bazzite on other handhelds. But this is the first time we have had official windows and SteamOS builds for the same hardware.
Marketing and market availability are the biggest problems. People need to be able to go into any store, buy a handheld/laptop/desktop and have it include Linux without them asking.
Don’t forget educational institutes. Linux should be the defacto OS at such places. The younger generation’s first interaction with a PC is at school. If they are used to Linux from a young age, this is greatly help them ease into the Linux mindset (package manager, terminal).
That too, as well as in professional and government settings.