It has little use for most people.
Something like this could be used for easily capturing navigable 3D environments using standard camera equipment. For example, a real-estate company could walk through a home while recording video of each room, then let that get automatically converted into a 3D model of the house. A potential buyer could then navigate through a number of houses from home through their web browser, or even in VR, to get a better feel for each of them than what a collection of photos can provide. The same process could be used for creating a model to base renovations off of, with potential changes to a room tested out in real-time. And people might just want to take 3D photos capturing a scene in its entirety, like a panorama, but with the ability to move around within that space. Or perhaps a game or virtual chat program could allow a person to appear in the virtual environment as they appear in person.
Though as far as their demonstration video went, it wouldn't exactly be practical to have a subject pose perfectly still while you take numerous photos of them from every direction. And for that matter, I suspect the system would get confused if you tried to do that outside a controlled environment, with other people walking around and trees blowing in the wind, and so on. AI algorithms might be able to filter those things out, but it's probably not going to be happening in near-real-time on standard computer hardware, at least not yet.