This is great. It doesn't paint a full picture, however. It's certainly possible to go farther leveraging the other rail lines in the area: PATH, LIRR, Metro North, NJ Transit Light Rail
Well it depends because they added the Grand Central line so that you can get from the middle of Manhattan to Queens fairly quickly as Grand Central stop at Jamaica station on the Long Island railroad which is a hack to getting to JFK without having to use the Subway.
