If you are not from New York and you arrive in the City, you have made it!
That doesn't mean you have it made. Far from it. You have to work and make "it" yourself. This is the place to start. You are, in a sense, home. Part of the "now" of civilization.
All "roads" connect to Manhattan.
Madison Avenue is wide-spread and Wall Street is deep pockets.
Hollywood comes to New York for a reality check.