“All of this work is broadly applicable to the PC platform, and it’s going to continue to expand over time. Supporting multiple platforms, multiple chipsets, controllers for different machines that are out there and even ones that aren’t out yet.”
[…] Valve’s goal with the OS is to have it compatible with traditional PCs, laptops, portable consoles and any other formats.
Personally, I think Valave has no reason to try to compete with Windows right now, regardless. Steam has a market capture that the Xbox store could only dream of, even with gamepass, and SteamOS expands their market into new areas outside of the Windows PC group.
I could also see a Streisand effect/TikTok to Red Note if Microsoft tried to prevent people from installing Steam where they draw more attention to SteamOS and people start jumping ship for other options - whether that’s SteamOS or not.