If the city authorities think that it can go on. It should not be postponed. New Yorkers are a tough bunch and the city needs to get back on it's feet ASAP.
This event can be a morale booster for the city.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Independence of the Seas 12/29/2013 Top-notch!