Fans of the series had to wait for years before the NMC's Texture Pack saw the light of the day. This mod took the quality of textures in Fallout 3 and New Vegas to a whole other level. Even today the game looks astonishing with this texture upgrading mod.
Fallout 4 looks decent, of course, but the recent screenshots don’t prove to be spectacular by any means. People have noticed loads and loads of little details lacking in the game texture department. Apparently, Bethesda wanted to release the game as quickly as possible and just let modders bother with the textures.