One thing I see as underestimated is that having a major standard device is huge for indie development and could greatly benefit the most flourishing artistic landscape.
One of the problems today is that the indie and AAA markets are increasingly distant, publishing a game on the PS5 or XSX digital store is prohibitive for a small indie team, but if Steam Machine is successful, we can expect more easy access to indie games by (ex)console gamers, and later a reduction in publishing costs on consoles.
I believe Steam Deck has already started this process, but with a device that will compete with the 9th generation of home consoles the indie game diffusion could accelerate.
I think it’s “huge” for Linux gaming in general and for the general health of the gaming industry. It’s a Linux PC in disguise as a cool form-factor Steam console. I hope it drives more developers of all types to build Linux support instead of just Windows.
The timing of this is also great, with people getting forcibly dunked into the bullshit that is Windows 11 after the end of Windows 10 support. If all my games worked on Linux, I’d have no use for Windows at all.