I had dreams about this ~2006, FWIW. I think there's something to be done there, even if it's only for visualizing existing textual code, via some kind of VR,

I had dreams about this ~2006, FWIW. I think there's something to be done there, even if it's only for visualizing existing textual code, via some kind of VR, using human spatial memory and intuitions to better effect than tabs and treeviews and back buttons for navigating files and code structure.