One of the included mods replaces the most important and common menu icons with higher resolution versions. This includes the undyed color for every armor, every weapon, every material, every key item, and some foods. The screenshots include several of my custom icons, but this mod only includes higher res vanilla icons.
HD_Menu's icons are 3.5x the resolution of the vanilla icons.
Switch_Menu's icons are 1.5x the resolution of the vanilla icons.
The other mod replaces all fully revealed map tiles with 1.5x higher resolution versions. It also replaces the fully zoomed out map textures with more detailed textures, giving the map a sharper look.
Things to keep in mind:
If you are playing the game in 720p, I doubt you'll notice a difference.
Not all menu icons are included.
3.5x res icons may be too much for the game to take. If it gives you issues, please let me know and try the 1.5x res icons. They should be fine.
Any map tile that includes unrevealed sections will not use higher resolution textures. But a fully revealed map will be completely high res.