If this was affordable enough (software + computer + sensors) running on something weighing no more than, say, 2 kilos (less is better) then I could use it right now! I'd use it for autonomous navigation.
Industry use cases I can think of right away:
- automated surveying of floor plans for remodeling or office or factory planning
- optimization of store floor plans for retail
- inspection and modeling of hidden, dangerous, and hard-to-get-at areas: culverts, tunnels, chemical and radioactive places
- local perception for self-driving cars
- autonomous navigation for "helper" robots, in anything from warehouses to data centers where retrofitting traditional location-based guidance would be cost prohibitive
- better vacuum cleaning robots than the Roomba type
Now, I'm assuming that the entire environment can be sampled quickly -- say, 30 ms for an entire environment sweep. A 1mm resolution modeling solution for a full 360 degree environment is a large amount of data. If there is some limitation to the amount of area that can be covered at a time, that would significantly change what the applications are.