If this has anything close to usable rigging data (from what I briefly read, it doesn't seem to), this would be a cheap pipeline for generating animations for real time applications out of video references.
As it is, it seems like it might help for video editing and VFX. Being able to isolate out a human being lets you do all sorts of editing with less issues that can then be composited over later for a final shot.
It also makes previz much easier. Stand-ins can run through the shots, including stunts. Then the main actors can be swapped in to provide a clearer estimate of what it would look like.