The future is drone boats serving as recon, electronic warfare and missile platforms, with stealth structures and minimal draught.
https://en.wikipedia.org/wiki/Northrop_Grumman_X-47C
Future would be a stealthy unmanned drone able to provide live intel and long loiter time of when would be best to strike the target without the target knowing it.
The gunboat diplomacy of the battleship is also it’s downfall, everyone knows it’s there so they can take countermeasures and hide or even target the ship.