Bethesda is going to release an official High-Resolution Texture Pack, and this will crank the look of the game to 11, but you do need a pretty monster-ish system to take advantage of this Texture Pack, with a Intel Core i7-5820K or better, 8GB+ of Ram and a GTX 1080 8GB. The Texture Pack will also take up 58GB of storage, which is about 2X the size of the fallout 4 installation size.
Bethesda is also giving some love to the PS4 Pro with the release of Update 1.9 this will include Native 1440p resolution, Enhanced draw distance for trees, grass, objects and NPCs and Enhanced Godray effects.