If you think RDP performance is good, you should try Sunshine+Moonlight. I regularly stream at 4k 120hz from my gaming PC to my laptop and it's basically indistinguishable from running locally. I've even run it over Tailscale from a thousand miles away (though at 1080p60) and it was still markedly better than RDP.
Caveats - You really want a Windows host for fully accelerated on-GPU hardware video encoding, the server setup is _slightly_ more involved than RDP which is usually preinstalled, and Sunshine+Linux+NVidia requires an annoying driver patch. But overall it's _amazing_.
Caveats - You really want a Windows host for fully accelerated on-GPU hardware video encoding, the server setup is _slightly_ more involved than RDP which is usually preinstalled, and Sunshine+Linux+NVidia requires an annoying driver patch. But overall it's _amazing_.