I'm talking about brand new spanking HD character/equipment textures and maybe things like anti-aliasing, bloom, ambient occlusion, depth of field, advanced/modern shadows, anisotropic filtering, post processing, etc...
I know about ENB but there has to be something beyond ENB.

I hope this question isn't ridiculous because I haven't seen this discussed thoroughly besides ENB, it has me thinking it's impossible without doing source code work.
This question arose when I finished modding skyrim with 253 mods, most of the mods were visual overhauls (textures, LOD stuff, etc..) which made the game look entirely different from the vanilla version, it made the game seem like it was recently just released. If something like this could be done with GunZ even on a miniscule scale that doesn't involve just ENB It would be a dream come true.