/vr/ - Retro Games

newfag here. Got a thing I need a bit of help with from tech savvy /vr/ anons.
Wall of text incoming, please bear with me. So it seems there are no good ways to emulate a crt on modern monitors. And I was thinking that resolution might be a factor.
On a crt you got a mask splitting the beams into three parts - red, blue, green. You got dots, stripes and oblong thingies. The distance between those dots (dot-pitch/pixel-pitch) vary a lot. For this post, let's assume they range roughly from 0.25mm (standard pc monitor) to 0.75mm (standard crt television).
That means if you want to actually display those dots in pixels you need a lot of resolution. A 19 inch crt monitor is about 36 centimeters horizontally. Thats 480 dots at 0.75mm. Each dot has three elements (red, blue, green) that you need let's say 16 pixels to display somewhat correctly (with the black around em).
Means you need 7680 pixels horizontally, or 8K.
So I thought up this crap all by myself and I don't know if it actually means anything - or if I'm completely wrong. Please tell me, /vr/-senpai. Perhaps you can already do a decent way to emulate a crt on 1080p by rendering a shader at higher resolutions and then sampling down. But that would be fucking expensive on the processing power end, wouldn't it?
If I'm at least partially on the money, CRTs will remain viable until 8K (at least) becomes the norm. Thoughts?

TL;DR
To emulate the look of a crt to a satisfactory degree, you need at least 8K resolution. True? False? Comments, please.