I have my LLM/gaming PC tucked in a rack in my basement:

- 100ft DisplayPort + USB cables going to my home office's monitor - 100ft HDMI cable going to the TV on the wall in my home office - 30ft HDMI + USB cables going to my receiver in the upstairs gaming/tv room

Works great. I can control/game from any of the three screens, and I also have Moonlight to sometimes control the PC remotely either in the house (bedroom) or externally via Tailscale.

I have an old Steam Link lying around, but I never have a use for it anymore, so while I can understand that there is an audience for Steam Machine, if you are capable, and have a dedicated gaming machine, a couple of long active/fiber HDMI+USB cables is all you really need.