I guess it is like most jobs these days, it will change or it will disappear. I've been around long enough to see how it's changed form flight strips to radar to electronic situation displays. During the same period the wireless op, navigator and flight engineer have disappeared from aircraft cockpits. Trains don't need drivers but they do have controllers, perhaps the pilot will disappear leaving a tussle between airline ops control and ATC for jurisdiction over the aircraft. En route ATC will change but will it be completely automated or keep a human in the loop? Tower control covers everything from A380s to homebuilts, don't see how that can be automated out of existence, but who knows.........Become a doctor, priest, lawyer or prostitute, they always seem to be around!