It's all about machines hunting humans. In the beginning there was a human operator. Next they gave the drones a bit of autonomy. Now they are talking about the drone doing most of it's own target choosing and humans simply checking the logs. Soon they may cut out the middleman and the drones will just hunt people, period. This sort of thing is not cost effective until you can cut the robot loose and let it operate itself.
If they can get matching ground forces working together with the drones we will be able to do away with the human element altogether. What is needed is robots that are unstoppable by the people they are hunting.