Looking around for info about there, I'm seeing very few mentions of it.

This seems to be one of the few: https://www.webwire.com/ViewPressRel.asp?aId=11400

It wasn't SGI. It came out of the University of Illinois, Chicago Electronic Visualization Laboratory. https://en.wikipedia.org/wiki/Cave_automatic_virtual_environ...

The original design used two projector screens, one for each wall, alternating with left- and right- eye views, with the user wearing shutter glasses keeping the vision in sync, while wearing a head tracker. They did use 7 SGIs (6 VGX workstations and a Personal Iris) for the system.

Full details at https://dl.acm.org/doi/epdf/10.1145/129888.129892 .

Later designs included displays on 4 walls plus floor for near immersive VR.

And also the resolution is too low for immersion. The resolution on yt covers all 180 or 360 degrees you are looking at. It is pixallated.

I watched some VR videos of DJ sets that I found very immersive. I think the trick was that the camera was at audience level and I could turn around and see people dancing around me on all sides.

I watched another VR concert that was just the performer and no audience, and that was kind of dull.