New Vegas might be my favorite game of all time, but I would by no means say it has good graphics. It has a great vibe to the world and impressive locations, but those character models, man...
Also the pop-in is insane. Seeing Helios One load in is crazy.
New Vegas is a graphical dilemma for me. It's obviously graphically dated, but it's art and graphics style are such a perfect match for the game and atmosphere that I don't think i'd want to see them updated.
The datedness adds to the experience honestly. I can't play with any mods that are too detailed, nor can I use any mods that add super high res textures. It's like the graphical uncanny valley for me.
The GFX were dated when it was released, compare it to Halo 3. Halo 3 still looks good and is from 2007, NV was released in 2010... The creation engine is kida trash for GFX even with the '16x fidelity" that FO76 got.
This doesn't mean I don't like it, just stating facts