system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why did display resolutions jump from 1080p to suddenly 4K? Why weren't any devices or monitors produced with 2K or 3K displays in-between?
gpt
4K is a bit misleading when you compare it to 1080p

1080p was using the number of vertical pixels (1080 comes from 1920 x 1080 pixels).

4k is using the horizontal number.

So you went from 1920 x 1080 to 4096 x 2160, so basically, it was "doubled" which amounts to about 4x the number of pixels since both numbers were doubled.