I have the feeling that current refueling in flight procedures are clearly more vulnerable than this approach that do not require physical coupling, for whatever these are useful (increasing operation autonomy, etc) the same for having to land in air carriers to extend patrolling times, this electric alternative seem safer in both scenarios, and at least with no more weak points than the fuel alternatives.
If is necessary to reload ammo no refueling-in-flight technology applies of course.
And if something blow up the damage radio clearly propagate immediately further than a battery fire, though regaring the situation a persistent fire can become also problematic, but these battery issues are still experiencing improvements, same happened with fuel counterparts (self sealing deposits, etc).
If this technology matures also recharging times will drop, we are seeing huge advances in plugged batteries.
I still see many advantages to the concept.
Physical coupling and emergency decoupling of a fuel tube in flight due to engaging or having to land and take off from an air carrier seems necessarily more slow and risky than beam interrumpion or nor having to land/take off at all.
Current batteries have not been under the same amount of research than fuel deposits, so I think that being matture enough, contacless repowering seems a great asset in any scenario.