> In 2014 you could get a phone with a 1080p display
You can buy a full laptop fur a fair amount less than many phones with high-resolution screens though, possibly more so back then. What spec was his machine beyond the screen? Also: most people are closer to their phone screen in use than they are a laptop, perhaps making the case for higher resolutions there stronger.
Reliably producing those 720/768 displays at common laptop & tablet sizes was cheap so making laptops/tablets around them was cheap, and more than enough people thought it good enough (or didn't know better). Given our experience above, the economies of scale on 1080+ panels have changed such that the 1080 screens are in the sweet zone.
(Kubuntu with KDE project's PPA to be on latest stable)
fyi: On their specification page[0] they list both 2880x1920 (s/b 3:2 aspect ratio) and that the screen is a 16:10 aspect ratio. I'm sure the 16:10 aspect ratio is a typo since 2880x1920 is used in multiple places.
[0] https://us.starlabs.systems/pages/starlite-specification