I do agree with Zan's idea of time being involved but one outcome I dont see happening that some people have suggested is everyone falling asleep and waking up years later and the nations are rebuilt and new structures. If everyone falls asleep who is going to rebuild everything? Unless people from other parts of Hydaelyn came into Eorzea and rebuilt if for them which I highly doubt. And wouldnt Dalamud affect the whole planet if it were to hit instead of a region of it? If some giant object were to hit a planet wouldnt it leave dust in the atmosphere choking out most if not all life? The concept art showing lush vegetation make me think it doesn't land.