I attended it a few weeks ago. So did Jeff Foust.
It’s not going to happen until the line of affordability crosses the line of desirability for a sufficient number of people. Over the weekend, Elon made the point that living on Mars is not for the faint of heart (or as a haven for rich people).
Meanwhile, the NatGeo series Mars has started to explore the legal issues, an area in which I am currently involved. Note that Dennis O’Brien is a big fan of the Moon Agreement (that he calls the “Moon Treaty”). I am not.