> it's widely accepted that there isn't much benefit for most people above 1080p

Is it? By whom? For larger TVs, closer distance, or a combination of the two, there absolutely is value from 4k. https://i.rtings.com/images/optimal-viewing-distance-televis...

Though I'm unlikely to ever upgrade from 1440p on my computer, personally.

Talking about resolution is pointless without mentioning screen size and display tech. PPI is better, but doesn't always work well comparing between technologies.