Looks like the 3D model is just for navigating the street-view-like set of panoramic photospheres. It's so far a necessary compromise, to get much more realistic photos before you can have perfect structure, material and lighting capture/rendering. (the benefit is clear looking at their scan of the old yc building), but if this is to be useful with VR (and it definitely would be) they'll need something in between those panoramic photospheres.