I would actually really love to get a proper cab setup for retro gaming, maybe with a Pi or something under the hood. Never have the time at the moment though - maybe one day I'll start a thread and pick your brains about it 
In a few years a raspPi will be bossing it, they're already pretty good (PC solutions currently quite a lot better) But the Pi will get there, RPi4 compatibility is proving very slow due to new graphics hardware.
Alas also in a few years unless something changes "proper" Cabs, ie with CRTs will be more expensive.