NES to SNES I suppose. Its also the jump where one style got “perfected”. Best looking SNES games are still best looking pixel games ever created.
I wasnt impressed by PS1:s 3D graphics -at all-.
The first 3Dfx Graphic cards for PC were the biggest leap that finally made 3D look good and not horrible. So in 3D id say that was the turning point. Quake 1 turned into a beautiful game with smooth 3D graphics never even imagined before, from the stale ugly bulky mess it was without Glide.
The next step was probably when normal maps and other material layers got popularized and materials were not just flat textures anymore.