This is CW, not pulsed. The only reason short-pulse people get away with calling it "Petawatt" is because the pulse duration and focus are both incredibly small. The total energy content on the other hand is often not that much compared to say the energy content in missile. Also, the Petawatt scale is state of the art, in a lab that is finicky to being hit on the side of the laser table with ball driver. It's not fair to use the state of the art as a figure of merit for a weapon to be deployed in combat situations.