I have always been thinking about stuff like this.
We mostly use RC just as a hobby but we all know that the functions of it could be quite useful.
I thought of replacing RC stuff, (not necessarily planes) to do stuff people can´t do or in that case robots can do much better.
You know those Drones from the US they use in regions like Afghanistan etc?
Probably not using RC for war but rather for stuff like you posted up there.
Gives inspiration to further ideas!!