Virtually no 4K content? What exactly do you mean?

https://www.blu-ray.com/movies/search.php?keyword=&studioid=...

There's a ton of 4K UHD Blurays. All of Apple's TV+ content is in 4K and HDR. Isn't most of Netflix's original content in 4K now too?

If you've got a capable gaming PC, lots of games support 4K resolutions, HDR, and high frame rates if you have a display.

I personally have no trouble feeding 4K content in to my LG OLED TV and it looks glorious.