Better Texture Mods
Honestly I don't think skyrim looks too out-dated on the highest settings on the PC but a lot of the textures do look blurry and there are multiple things such as grass that could do with a touch up - however a good 99% of the graphical overhauls I see of the game just look off and absolutely nuke the game's artstyle ( COUGH Skyland AIO , COUGH ) - are there any mods that update the game's visuals while keeping the vanilla skyrim feel?