Are you sure about that? You likely use DPI scaling at 4K, and you’re likely limited by physical screen size unless you already use a 50” TV (which is equivalent to 4x standard 25” 1080p monitors).
8K would only help at like 65”+, which is kinda crazy for a monitor on a desk… Awesome if you can swing it, but most can’t.
I tangentially agree though. PCs can use “extra” resolution for various things like upscaling, better text rendering and such rather easily.