Back in the late 1990s, when I was at grad school VRML was going to take over the world. My peers and I built all manner of useful and interesting things with it by hooking it u
I think it has a bit to do with the demise of SGI. Yes I know SGI is still going, but it's a shadow of it's former self.
Once SGI dropped IRIX, and switched over to being just another Windows Server Vendor, it was all over for VRML and all it's associated technologies.
I remember years ago SGI started publishing a cute little VRML animated cartoon called Floops. You could watch this little character doing his thing, while manipulating the VRML world in 3D. It was very cool, and very revolutionary for the time.
It's a shame VRML failed. It seemed to have so much potential, and there really is no viable alternative now.