"Thinking of simulating earth @<a href=""https://www.youtube.com/watch?v=Gfr50f6ZBvo&amp;t=29m50s"">29:50</a> ", I wonder if that will first happen in something like Microsoft Flight simulator where in a crude way they have made a digital-twin of the geography and architecture of the entire globe and are also pumping real-time data into such as weather and flight records. I am thinking that if they keep working away at making the twin better and better (for the sake of the people flying around in simulated aircraft ) they will eventually get to a point where it take on "a life of its own"  especially if they start plugging other games into it.