I think games could look a lot better if we had the option to automatically upscale textures with a filter like Lanczos or Jinc before rendering them in-game.
How this could look in settings:
You can do something like that with the Ishiiruka builds:
It doesn't have lanczos, but bicubic is also good. Beware of slowdowns when textures are loading and are upscaled in real time. If you have the time and really want them upscaled without performance issues, you can dump the textures with the upscaling enabled, and then load them as custom textures later if you place them in the "Load\Textures\GAMEID" folder.