The idea didn't spring fully formed from SGI. It was a natural extension of 2D graphics accelerators which were initially used for engineering (high value, small market) and later for business applications generally and games (lower value, large markets). 3D acceleration took the exact same path, but the utility for gaming was much higher than the general business utility.
Of course graphics hardware was also used for more creative purposes including desktop publishing, special effects for TV, and digital art, so you will find some people in those communities vaguely wishing for something better, but artistic creation, even for commercial purpose, was never the market driver of 3D acceleration. Games were. The hardware was designed for gamers first, game programmers second, game artists a distant third, and for nobody else.
The closest thing to an "art computer" around that time was the Amiga which targeted the design/audio/video production markets.
Of course graphics hardware was also used for more creative purposes including desktop publishing, special effects for TV, and digital art, so you will find some people in those communities vaguely wishing for something better, but artistic creation, even for commercial purpose, was never the market driver of 3D acceleration. Games were. The hardware was designed for gamers first, game programmers second, game artists a distant third, and for nobody else.
The closest thing to an "art computer" around that time was the Amiga which targeted the design/audio/video production markets.