[davnicwil]

Just on the off chance these are anything but tongue in cheek, I think at least wrt tourism it is completely unrealistic.

It's hard to see how the cost and difficulty of interplanetary travel could in any reasonable (or just any) time frame beat other, new, forms of entertainment and relaxation that may constitute or replace tourism in the future. Completely realistic VR 'holidays' to anywhere, simulated or invented, comes to mind as an obvious alternative.