I must say that it has almost an air of unreality, when you contrast it with the nightmare that became planning and budgeting for Space Station Freedom, VentureStar, and Constellation (and now, yes, SLS) in our own timeline.
And yet, I can't say that it's entirely implausible, either.
It just shows how much more efficient Propellant Depots are for getting beyond LEO. By using Depot's you are building infrastructure to continue exploration instead of just visiting. Unfortunately I suspect that we are going to sink $30 Billion into SLS and only then will people realize how wrong that path was.