I used some SGIs in the mid-late nineties, and they did have cool 3D graphics capabilities. I found 4dwm to be kind of cool but mostly gimmicky and it was real

I used some SGIs in the mid-late nineties, and they did have cool 3D graphics capabilities. I found 4dwm to be kind of cool but mostly gimmicky and it was really slow on the Indy and O2. Windows 95/NT were much snappier on contemporary hardware. By '97 or so SGI actually had essentially given up competing when they shut down the team that was developing the successor to InfiniteReality. In a sense though, Silicon Graphics did become more standard, in that their original 3D framework was Iris GL, which then evolved into OpenGL, which became the main 3D graphics standard for many years.