Hmm.....JFK has actually lost a lot of traffic since 09/11 as flight schedules have been pulled back. Some important routes, like the short lived JFK-HKG flight operated by UA, as well as UA's Latin America routes from JFK are no longer operating. Construction on new terminals is slowing (the AA terminal project is still going, but it is being slowed, according to reports in the local news and newspapers). JetBlue is the only shining star there right now, and the only symbol of growth at JFK. AirTrain is on track, but a worker was killed this year as a result of a construction accident related to it. Terminal 4 is nice, as is Terminal One, but Newark surpassed JFK long ago as the busiest airport in the region. Delta has probably postponed remodeling its terminals.