Same at LGA. So it's all for naught. The biggest problem with NYC airports are the long delays.
Terminal One at JFK has a huge problem with gate availability IME. I've seen inbound flights wait way over an hour for a gate.
As far as additional runways, at JFK they'll need to reclaim some of Jamaica Bay, which would probably be a non-starter with environmentalists.
With LGA maybe they'll kill two birds with one stone, converting Rikers Island into some kind of an expansion of LGA.