Ok, you get some great performance out of that 2080 Ti for the most part, but camera panning is a big chunk of the gameplay. Perhaps I can get smooth enough performance from a RTX 3080 w/ 5950X in ultra @ 4K resolution (leaning towards the LG OLED), without DLSS and it's glitches, because I have 4x Corsair One Pro on hand and can use one as a placeholder until the EVGA E1 is released (3090 Ti is rumored to launch March 29th).

Interesting Star Trek looking display at the top of your case, I've never seen such. I recognize that 2080 Ti FE (Founder's Edition). I built this rig using exclusively 13x 2080 Ti FE, shown sitting directly in front of my A/V rack. That model looks and feels premium, but it has the worst cooling/temps of any 2080 Ti that I've dealt with. Blowing a fan across it's backplate is necessary to lower the VRAM temps. And hearing you complain about the heat of one 185W GPU, heh, you got it so easy.

I've also PC gamed some on my HT using the Corsair One Pro with a wired Xbox controller, as in 19h total according to Steam. It was quite comfortable and ideal, but I haven't implemented keyboard and mouse gaming in the HT before either, I'm still looking into how that could best be accomplished. I'm thinking I'd literally need to park a computer desk in the middle of the room. And I did do what you said you were considering, I had an ethernet, HDMI, and even a fiber optic run installed linking my home office to the HT room and used a wireless xBox controller, but having a PC in the HT room made more sense. Much time to ponder the setup until BG3's release.

Dell opened orders for the world's first QD-OLED display today.