Originally Posted by
eponymous_coward
So, you basically want a very expensive express train to aid you in doing LGA-JFK/JFK-LGA transfers? It's not like real estate and construction's particularly cheap in NYC, is it, so you're probably talking a lot of money... and if it's an express train, it's not going to be able to serve the other regions, so limited ridership and use.
It's not gonna happen in a distant future. It will so extremely expensive. They won't take you there. You have to take a bus or taxi.