IBM shipped the first PC GPU (the Image Adapter/A, 1989) following on the first PC 2D accelerator (the 8514/A, 1987). There was zero benefit to being first. 3dfx had the first mass market, cheap GPU in 1996.
ATI (AMD) in 1989 copied the unpatentable parts of the 8514/A, improved it, and went on to dominate 2D accelerators.
nVidia’s first 3D card was a complete flop. They did not achieve success for years.
Nvidia is in the right place at the right time.