I have access to a 1080p Panasonic Plasma TV, 4K LED Samsung TV and then a 1080p 32" LED TV in my arcade cabinet, with regards to displaying content, in particular retro games via emulation, I do find the plasma handles blacks better i.e. blacks are black, better colour re-production and generally produces a more natural looking image. The only problem with plasma screens is the dreaded “burn in”. When you spend more time in the RetroArch menu like me, tinkering with shaders than actually playing the damn games you start noticing the white text and icons from the RetroArch menu when the kids are watching Spongbob Squarepants
Having said that I do find that most of the CRT shaders appear more realistic on the plasma, maybe this is because the plasma handles blacks better. The dynamics from the fake scanlines blend more naturally with other colours. I always struggle getting a natural looking image from LED TV’s, blacks appear like dark greys (lowering contrast crushes black levels where you lose details), colours over saturated etc…
I have my beloved 14" CRT TV from over 25 years, this has an RGB SCART input, along with my original N64 which I bought on release date! The N64 has been modified to output RGB, when these two are hooked up it’s pure eye candy - real scanlines, real colours, clean, natural, untouched, and unadulterated visual retro joy.
I would love to have all the consoles hooked up to a few different CRT TV’s but the amount of space required and cabling logistics would be difficult to manage, this is why for convenience, I stick with emulation.