How the Tourism and Movie businesses in New York City do if the CIty needs to count on them depends a lot on the wisdom of the next Mayor.
If he (or she?--Ruth Messinger, maybe) allows crime to rise significantly it could put a damper on the tourist trade. If that same new mayor, fishing for revenues, starts to squeeze the entertainment industries for fees and taxes, they'll look elsewhere as well.
Haven't you seen those movies with scenes that are supposed to be in New York, but the subway trains look suspiciously like Toronto?