They are all good advances, that which I have read about, like electrodynamic catapults. What I have not heard about lately are the new defensive weapons, such as a rumored laser and rail gun. Who knows how far away and how much over budget that stuff is. But it has to start somewhere, and part of a carrier budget seems a good place..
There’s not going to be any sort of fielded railgun before 2020, and no free electron laser till 2025. At best.
Use an Nuclear Acclerated Generator for a laser or railgun on a ship or a plane. 2-3 of these generators will probably sink a ship.According to DARPA,NAG technology could produce 100,000 times more power than conventional nuclear technology. This is not a guess; it has been well established in experiments.