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Comment by delamon | Hacker News Reader

4K alone is not enough to define spatial resolution. You also need take into account physical dimensions. DPI is a better way to describe spatial resolution. Anything better than 200 DPI is good, better than 300 is awesome.

Unfortunately, there are no 4K displays with 200+ DPI on the market. If you want high DPI you either need pick glossy 5k@27" or go to 6k/8k.

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of course "normal viewing distances" is always implied when talking about monitors. And if you REALLY want to get pedantic you need to talk about pixels per degree. The human eye can see about 60. according to the very handy site https://qasimk.io/screen-ppd/

a 27" 1080p screen has 37ppd at 2 feet.

a 42" 4k screen has 51ppd at 2 feet.

a 27" 8k screen has 147ppd at 2 feet which is just absurd.

You have to get to 6 inches for the PPD to be 61

But a 42" 8K screen should have around ~100 ppd, which is really nice but not unnecessarily detailed.

I know I'll be gunning for the 42" 8K's whenever they actually reach a decent market price. Sigh, still too many years away.

> The human eye can see about 60

I cannot brag with sharp eyesight, but I can definitely tell difference between 4k@27" at 60cm = 73PPD and 5k@27" at 60cm = 97PPD. Text is much crisper on the latter.

I've also compared Dell 8k to 6k. There is a still a difference, but it is not that big.

"Much crisper"

You must have exceptional eyesight.

> Unfortunately, there are no 4K displays with 200+ DPI on the market.

There are 4k 24" monitors (almost 200 DPI) and 4k 18.5" portable monitors (more than 200 DPI) you can buy nowadays

4k 24" monitors used to exist, but they've disappeared from the market and now the choices are either 27+" or laptop panels.

Why did they stop making those? When I went to 4K, I wanted to get a 24” monitor, but there were none.

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