That was always Gabe’s intention with SteamOS when it came out around a decade ago. He has never really liked windows, and definitely never liked the potential for Microsoft to mess with his product. SteamOS was made from the ground up to supplant windows as the primary gamer OS, we are just now witnessing the turning of the tide.
Not sure if it’s right, but it seems to me this is really just a bunch of preconfigured fedora instances for specific use cases with containerized packages you can mix and match to your needs. Then they slap on a bunch of buzz words to make it sound novel.