Good point.  Even today "Rayman Legends" is a game I could see looking good even in twenty years. Not sure a single polygon based game today will stand up as well.

Hmm its been a while, I remember I was really impressed with Tekken and Gran Turismo, but my favorite was Ridge Racer 4, really liked the looks of it so thats my vote

Very good choice.  Don't know that 3D was in a place to compete with such beautiful sprite work at the time.  I think this is a strong contender.

The crash bandicoot, spyro and other cartoony looking games made better use of the ancient hardware, they hold up much better than the more realistic looking games like mgs1.

Hmm Chrono Cross or Legend of Mana. Vagrant I loved the art direction and style and the 3D was good.

Guilty Gear Xrd?

Touche WC4Life.

What?

It is polygon based.

Lol

Ok.

Another more traditional 3D game could be Bloodborne if it gets NEO enhancement. It might not last 20 years but let's say 10 years at least and this is because the general atmosphere of the game hides the graphical flaws, you just don't notice them or care.

Racing games also hold up very well. Like in this very thread, Ridge Racer Type 4 is acknowledged for its pretty graphics and for ultimate example there is always F-Zero GX which is still beautiful game and offers unmatched feel of speed.

Then there are games like Super Mario 3D World which will look good always.