To get a feeling for the layout and relative positioning of things. Sure it's possible to do by examining several 2D pictures, but interpreting 3D environments

To get a feeling for the layout and relative positioning of things. Sure it's possible to do by examining several 2D pictures, but interpreting 3D environments is far more natural, and it would allow the operator to rotate and so on to get the best angle available. Also, since the camera is moving, one doesn't need to use multiple.