I have been enjoying the original console I designed and built myself running a raspberry pi 5 and a fully built and compiled retropie that can crank out some dolphin and redream with full 60fps. I have plenty 90s gaming I need to catch up on.
For everything moderately modern, I have a steam deck. If it doesn't or cannot run on my retropie or my deck then I'll wait till the next hardware refresh. If it takes half a decade, all the better.
I hook it up to TVs all the time! It looks great on my 1080p projector on a 95" screen and perfectly acceptable on my girlfriends ginormous 4K TV.