Last years top end 55" 4k OLED sets are on sale now and can be got for around $1300. There is no doubt prices are coming down. Mass production is ramping up. A laptop screen was recently announced and LG sales forecasts expect a big increase in sales again this year. Next year they will switch manufacturing of the panels to high end sets and apparently that will reduce costs further.
A 4k TV that costs $400 will look like dogshit compared to one that costs $1300-2000+.
For 1300 and up I would expect an OLED screen. But 1300 is way too much to spend on a TV.
NES, SNES, Genesis, PS1, PS2, GBA, GameCube, Wii, PS3,
Wii -U, PS4, Switch, and PC.