What was the 3D file browser used in the movie "Jurassic Park"?
Is it a real product and is it still relevant today?
3D file browser was FSN on IRIX, there are similar opensource browser http://fsv.sourceforge.net/ .
It's really just for looking cool, not very useful.
To answer your second question - it's no longer relevant.
3D file systems are really just a gimmick. They don't add anything to the user experience & usually get in the way.