That 1080p tv you just bought is about to become obsolete

Saints#34 said

Isn't there some resolution beyond which the human eye can't discern any more clarity? Is a 2160p screen really any better than 1080p?

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I think that it's 4320. There are 4k displays but they are not being mass produced. I'm pretty sure that the human threshold is why they stopped at 4320.