Now, I really don't think the city is gone forever. Other cities have suffered dreadful calamities and recovered; Lisbon, San Francisco, Chicago. It just takes time. Geography is destiny, and New Orleans' geographical location hasn't changed.
My main frequent connection to that city is that I've become rather fond of the New Orleans-style frozen dinner bowls from Zatarain's, which is headquartered in New Orleans. I don't know if they have any other manufacturing plants outside of that city or not. If not, then my supply will dry up soon and not return unless and until New Orleans is back in business. I usually eat one or two a week, since they fit nicely in my lunchbox. I like spicy Cajun-style food as a change of pace. I'll be sad if it becomes more difficult to get.