Maybe some applications like these could need a high density just for the size of it, but then again you’re not likely to be looking from a living room distance either. Or things like VR where you’re looking from very close up.
My biggest screen is a 55" 4K and I just don’t get why you would need much more unless it was a full on theater setup.
Yeah, good luck convincing the rest of the world to change to fit your wants.