I loved the demo, but I think that 3D interfaces very rarely bring any value to your brain. After all your visual system is built around the idea of turning n-dimensional noise into a non 3d abstraction.
At the same time, speaking from personal experience - 3D in VR can give a much stronger sense of overview of many datasources etc. while at the same time can reduce semantic noise.
I get quite a few productive hours out of a successor to this: https://www.youtube.com/watch?time_continue=1&v=Js7Y1H5D8cY