Didn't Gabe Newell basically confirm 13 years ago already that they were aiming for that ?
SteamOS was released in that year as well: https://github.com/ValveSoftware/SteamOS/commit/0aad7085a1a9...
All of their hardware released since then seems to be aligned with this concept and they have clearly put a huge amount of R&D and funding into this approach.
No shareholders. No dopey stock market magazine articles. No quarterly “did you make the line go up? why not?” reports. You can execute on a 10 or 20 or 50 year vision when youre beholden to only your customers, your staff, and yourself and not a pack of rabid wolves.