Text rendering alone makes it worthwhile. 1080p densities are not high enough to render text accurately without artefacts. If you double pixel density, then it

Text rendering alone makes it worthwhile. 1080p densities are not high enough to render text accurately without artefacts. If you double pixel density, then it becomes (mostly) possible to renderi text weight accurately, and things like "rythm" and "density" which were things that real typographers concerned themselves with start to become apparent.