The only use that thing has in extreme environments. That thing has no practical military application. 1% out of 100 humans is better than 100% out of one machine. If one human goes down, you still have 99%. If the machine breaks down, you have 0%.
My opinion on it's usefulness doesn't mean I think it shouldn't have been invented.
Contaminated nuclear sites would be a good use. It might be able to recover bodies. If they had a way to store lots of battery power on one of those things, they might be good for space exploration (planets or asteroids).