I work in IT and security, where everyone is an expert. Couple that with my inability to tell half-thruths about complex subjects I have incomplete info about, and I come out as incompetent. Yay.
I use a 2016 Asus Zenbook with integrated intel gpu.
The performance is comparable. The only thing that's different is latency, obviously, although it's fairly negligible on LAN, and encoding/decoding sometimes createa artifacts and smudges, but it's better at higher bandwidth.
My box sits in my closet, so can't really help much with docker or vm. But I use sunshine server with moonlight client. Keep in mind you can't fight latency that comes from distance between server and client. I can use 4/5G for turn based or active pause games but wouldn't try anything real time. On cable my ping is under ms, enough to play shooters as badly as I do these days.
I use AMD for CPU and GPU, and wouldn't try nvidia if using Linux as sever.
I did use to run a VM in xenserver/xcp-ng and passthrough gpu with a mock hdmi screen plug. A windows 10 vm, ran very well bar pretty crap CPU but I did get around 30fps in 1080p tarkov, sometimes more with amd upscalling. Back then I was using parsec, but found sunshine and moonlight works better for me.
I should also mention I never tried to support multiple users. You can probably play "local" multiplayer with both parsec and moonlight, but any setup that shares one GPU will require some vgpu proprietary fuckery, so easiest is to buy a PC with multiple gpus and assign one to each VM directly.