If compared to a smartphone, maybe.

No, it is a poor pixel density when compared with a printed book, which should be the standard for judging any kind of display used for text.

At the sizes of 27" or 32", which are comfortable for working with a computer, 5k is the minimum resolution that is not too bad when compared with a book or with the acuity of typical human vision.

For a bigger monitor, a 4k resolution is perfectly fine for watching movies or for playing games, but it is not acceptable for working with text.

Compared to a smartphone it's not just poor it's complete dreck. Smarphones are in the 400s.