The difference is likely size and expense. Now you don't need a 100 million dollar Boeing 737 sized drone to loiter for 3 hours. Previously small and cheap drones could loiter for 40 mins on an internal battery. Now they can stay up for 3 hours. That can be useful. Of course these mobile wireless recharging stations will become military targets for the opposition. So the overall combat math isn't obvious to me, but it's not a tech I see as obviously useless. This could be much more straightforwardly a win for civilian applications.