I was thinking what about using them as deployable mines? Imagine a special forces team making an entrance or exit having those programmed to land behind them as they move to protect their egress route. While having the ability to recall and reposition them at will. Or even use them to clear rooms that might have wires, motions sensors etc.. better to lose a $50 helicopter than a human life.
The weaponization of these things bothers me to no end. I have no problem with the military using them as a life-saving measure, like when their use in a mission would mean fewer lives lost in the end, but so far these technologies have largely removed the human element, and turn killing into a game.
That being said, some of the proposed military uses are awesome, like using them as small wireless internet routers, constructing a hard to destroy network based communications system. That could be used both by the military's intelligence teams, or by civilians in situations where their local governments have shut down communications.