For instance, for a generated real world RPG, one process could create the planet, one could create the city where the player starts, one could create the NPCs,

For instance, for a generated real world RPG, one process could create the planet, one could create the city where the player starts, one could create the NPCs, one could then model the relationships of the npcs with each other. Each one building off of the other so that the whole thing feels nuanced and more real. Repeat for quest lines, new cities, etc, with the npcs having real time dialogue and interactions that happen entirely off screen, no guarantee of there being a massive quest objective, and some sort of recorder of events that keeps a running tally of everything that goes on so that as the PCs interact with it they are never repeating the same dreary thing. If this were a MMORPG it would require so much processing and architecting, but it would have the potential to be the greatest game in human history.