In any case, it almost doesn't matter. If we get the kind of human
presence in Earth orbit that pretty much everyone on this NG hope for,
with multiple space staitions for multiple purposes (tourism,
manufacturing, etc.)and orbital spacecraft being flown to and from them
(and to unmanned sats for whatever reason) hundreds of times a day
(including people transferring to deeper space flights, a'la 2001

Out of curiosity, where are all these people going, what will they do
when they get there, and how is a profit being made on the flights?