This is a super interesting project, and the video is really well presented and explained, if you prefer that format.
I think this method could be brought even further by using ‘thin clients’ (a cheap laptop or used office mini-PC), making it possible to access the main gaming rig from any room in the house as long as you have access to a good network speed.
Utilizing a ‘dummy’ HDMI or Displayport stick, which simulates a monitor for the GPU, you could then remote into the gaming rig from a thin client-like PC through Parsec or Moonline/Sunlight, allowing you to use it as a fully fledged gaming or workstation PC.
If anyone decides to go that route, be aware that AMD GPU’s have pretty notoriously bad encoders/decoders, so I’d recommend sticking with Nvidia or Intel GPU’s.
Wasn’t UNIX (and thus Linux) all about multi seat like since the seventies?
Yes, but mixing in 3D hardware acceleration was apparently quite difficult to achieve until systemd came along to make it somewhat painless.