Early 90s: SGI invented OpenGL to make realtime 3D graphics practical, initially for CAD/CAM and other scientific/engineering pursuits, and started shipping expensive workstations with 3d accelerated graphics. Some game artists used these workstations to prerender 3d graphics for game consoles. Note that 2D CAD/CAM accelerators had already been in market for nearly a decade, as had game consoles with varying degrees of 2D acceleration.
Mid-90s: Arcades and consoles starting using SGI chips and/or chip designs to render 3d games in real time. 3DFx, founded by ex-SGI engineers, created the Voodoo accelerator to bring the technology down market to the PC for PC games, which was a rapidly growing market.
Late 90s: NVIDIA entered the already existing and growing market for OpenGL accelerators for 3D PC gaming. This was a fast-follow technical play. They competed with 3DFx on performance and won after 3DFx fell behind and made serious strategy mistakes.
Later 90s: NVIDIA created the “GPU” branding to draw attention to their addition of hardware texture and lighting support, which 3DFX didn’t have. Really this was more of an incremental improvement in gaming capability.
Early 00s: NVIDIA nearly lost their lead to ATI with the switch to the shader model and DirectX 9, and had to redesign their architecture. ATI is now part of AMD and continues to compete with NVIDIA.
Mid 00s: NVIDIA releases CUDA, which adapts shaders to general purpose computation, completing the circle in a sense and making NVIDIA GPUs more useful for scientific work like the original SGI workstations. This later enabled the crypto boom and now generative AI.
Of course, along the way, OpenGL and GPUs have been used a lot for art, including art in games, but at no point did anybody say "hey, a lot of artists are trying to make 3D art, we should make graphics hardware for artists". Graphics hardware was made to render games faster with higher fidelity.