Sure. It beats re-scheduling and having all the invitees re-book travel on a very tight deadline (not to mention where, it's possible NYC won't be able to host such an event for a while).
If SF had an Earthquake right before a scheduled event, I wouldn't hold it against Apple if they made it into a press release type announcement.
If SF had an Earthquake right before a scheduled event, I wouldn't hold it against Apple if they made it into a press release type announcement.