If I may add my two cents. "Shattered Sword" did state that not as many IJN pilots and air crews were lost as originally believed. However, it was a morale booster for the Americans(our Pacific allies as well). It was also a huge material victory. The Japanese, in a single day, lost four of their fleet carriers to our one. They'd still have Shokaku and Zuikaku and a few smaller carriers, but the advantage in numbers was lost. The Japanese were able to produce carriers throughout the war, but they could not keep up with US production once it got rolling. Their surface fleet was still a deadly force at Guadalcanal, but I don't believe they'd had the capacity to strike deep into enemy territory after Midway. Anyways, that's my POV on this discussion.