I have bought and tried Microsoft Flight Simulator for about a week now. The world engine is great. It makes other sims look quite dated. Among these X-plane. Now X-plane has great physics but the world engine is not that great. For better visuals people can download ortho scenery via 3rd party apps but it is cumbersome and feels archaic.
I think X-plane needs to do something about the scenery, and I think a collaboration between X-plane and Outerra would be great. It could be the civilian version of the TitanIM-project.
I have no idea if it would be possible from a tech/licencing standpoint. I can imagine the satellite dataset is quite expensive. Maybe something could be worked out. Anyway, I'm sure other people have thought about this, just wanted to lift the topic due to all the hype for the new Flight Simulator. As a long time follower of Outerra - i just hope I would get the opportunity to use Cameni's fantastic world engine in Austin's fantastic simulator.
Best wishes!