:
They are very low-res, and that's a fact. Consider small development team and Unity limitations, though.
If you don't believe me, take a look at e.g. a five-year-old game |
Look at the scene complexity between your image and the NNT one. It's a shitty comparison.
Anyway, it looks like some things/everything in your example goes through some kind of grit-detail shader anyway, which masks how low-res some of the textures in that image are.
Also like Manco said, it will look nicer on a 4k monitor.