My first 3D accelerator was a Voodoo, and shortly after that a Riva TNT, which wasn't anything special at the time. Back then, I remember there were many more consumer GPU manufacturers, and almost all of them were bringing new features to GPU's. The naming of OGL extensions reflected that. Years before everyone else, 3DFX was doing SLI, ATI had primitive hardware tessellation and the first unified shader arch, and Savage created gpu texture compression. The modern GPU wasn't invented by NVidia, but by contributions by many GPU designs.