[phil21]

I think if this tech proves to somehow work (aka actually reduce expenses by at least 10x) the real play becomes PtP tunnels that don't follow the traditional "heavy rail" subway routes, but connect to those stations for transfer.

This also could really only be the long time play anyways - it's the only reason using autonomous battery powered model X's as the "cars" makes much sense.

I think it's an interesting idea, Musk obviously likes his sci-fi. He is basically attempting to implement packet switching for human mass transport vs. the current circuit switching we have.