The lower resolutions would require non-integer scaling and so far my experience doing that in Linux environments has been very poor. I don't expect this to be a smooth experience any time in the near future. I'd love to be proven wrong though.
With GNOME, screen elements (texts, windows and widgets) are big (way bigger than macOS or Windows). In this case 1080p-like at 2x scaling should be OK with this screen size.
But people will swear up and down to me that there is no way I could possibly tell the difference between screens.
You can literally see individual pixels on a 1080p screen!
I am on Macbooks, but I want to switch to something with Linux so I am waiting for the gen 9 Thinkpad X1C with 4k screen to be available at some reasonable price.
Font rendering is also clearly worse on Linux than Mac, making the fuzzy pixels even more unworkable. I dual booted a 2015 Macbook Air into several Linux distros and I could barely read the text no matter which settings were applied.
More relevant to the overall thread: Pop OS is awesome.
Yes, they are needing for to change name, however. "Pop_OS!" is very a stupid name, no low hyphen "_" charactir or exclimation in name is good. Only "Pop OS" is good.
I bought an Acer at the tail end of last year because I need color accuracy (and couldn't get my hands on high-end HP or Dell or Lenovo in Thailand because markets).