These will be a partial defense to high Mach number missiles, but probably not to sub-orbital ballistic warheads.
Bottom line, carrier groups, capital ships and sometimes even submarines will face a growing risk of not surviving an engagement.
What is the capabilities of a 16 inch battleship firing 16 inch versions of these rounds.
Gerald Bull could have told us that 20 years ago, if the US had been smart enough to keep him on the DOD payroll.
I believe their #1 purpose is to defend against China's new high speed missiles/torpedoes that travel barely above the water. They're currently the main threat to our large ships.