New York subway system is probably the best we have in the US, but it's laughably bad when compared to the top players. I've traveled to Japan and during my trips I've been amazed by their train system. It was always on time and it ran incredibly frequently, so missing a train usually wasn't a big deal. Although I haven't visited there, I've also heard incredibly positive things about China's trains.

My point here is that there's still a lot of room for improvement, even if you limit yourself to trains. It doesn't seem like such a stretch to extend it a bit further to this new emerging system.