Lazers are neat and could work well for ships or static facilities where the power systems can be defended and the area to defend is small. They don't really have the same hard limits to overwhelm as more traditional systems, but who knows if other limits will be present like say number of targets they can engage at a time. Lets say its the case of 3 targets can be engaged at the same time and the time before impact gives the lazers 3 chances to eliminate (as they do need time on target for effect, its not quite starwars blasters), giving the system a limit of 9 per incoming volley. That would be easy to over come, but what if its not 3 but 300 and time allows 40 attempts? The systems could be fantastic, or a small speed bump.