To provide some references for my assertion that "3d user interfaces are just not that effective for most applications," there are a lot of systems that have be

To provide some references for my assertion that "3d user interfaces are just not that effective for most applications," there are a lot of systems that have been tried in the 1990s and 2000s, most of which you can try out today to see why: https://en.wikipedia.org/wiki/VRML https://en.wikipedia.org/wiki/VRML https://en.wikipedia.org/wiki/Fsn_(file_manager) https://en.wikipedia.org/wiki/Fsn_(file_manager) (Free Software clone: https://sourceforge.net/projects/fsv/ https://sourceforge.net/projects/fsv/) https://en.wikipedia.org/wiki/Croquet_Project https://en.wikipedia.org/wiki/Croquet_Project The one big non-entertainment application that 3d worlds are good at has been teleconferencing. There are a bunch of what are essentially 3d chat clients around, and many more have gone out of business.