The urgency of war paved the way for rapidly streamlining economic production methods. For example, at the start of the war Liberty Ships (cargo vessels) took over 8 months to build and launch. Near the end of the war, it was down to six weeks. These sort of improvements were seen throughout all manufacturing areas, and the price reductions made many post-war commodities much less expensive. It set the stage for overall national prosperity. One can also point to the "Bigger is Better" mindset coming from this experience, and mistakenly trying to apply it to everything. One size does not fit all, but that's another issue.
Pearl Harbor resulted in our entry into WWII ... and an increase in our military forces ... after the war, we did not reduce our forces back to pre-war levels (as we had done historically) ... which increased the economic strength of the "military-industrial" sector of society.
well, first many men were killed, second, the navy lost many expensive battleships, and third we were brought into world war 2, which after the world had to pay off war debts united states payed for those, and then came the roaring twenties which then, is the great depression. (And right now we're are in the worst 4 years of economy since then and no, it's not bush's fault.)
The availability of an ample harbor on the island of Oahu increased the migration of year-round residents to Honolulu. That and the growth of tourism have displaced agriculture. With less grown on the islands, food has become expensive there. Those of us on the mainland must now get most of our tropical fruit from Latin America, Some of it is OK, but it lacks the rich mineral content of produce grown in Hawaii's volcanic soil. We have to get our minerals elsewhere, vitamin pills for some of us. It is conceivable that nutritional disorders and their treatment have increased as a result, but it is hard to say.