"Beautiful typography" refers to the visual appearance of written or printed text. It relates to the art and design of choosing and arranging fonts, letters, and characters in a way that is visually appealing and pleasing to the eye. Full definition
It was the first computer with beautiful typography. (entrepreneur.com)
I believe the Kindle Paperwhite display is capable of rendering truly beautiful typography, but that would require fonts that were chosen or designed with the limitations of e-ink in mind, along with improvements to the font rendering algorithm. (daringfireball.net)