Augmented, as in the video of the floorcast app, can add things.
(fi, you can add cabinets or textured faces)
This works quit well in the mobile viewer, you can download your own or use 3D Warehouse models.
However, it does not erase walls. You need to model it as a larger room (or not model the dividing wall of two rooms.
Scans are good for ‘as build’ and can be a good base to build the model and then create walkthroughs in a virtual reality.