The closest you'd have to get to aircraft modeling is that someone will inevitably demand a window "frame" that looks like the window of a 747. :-)
Are you planning on an SDK that would allow Outerra users to model their favorite home-town airports?
Hardy has never released products that contain modules made by other people, for what it's worth. However, especially in this incarnation, he's going to great lengths to insure compatibility with non-native extensions. Would that be a problem? In other words, a user would purchase PSX, then purchase Outerra, and then run them both on a network and get them talking. Maybe several instances of Outerra running simultaneously to represent the view out several windows, with PSX sending information to each? Like one monitor showing straight ahead, one showing -15 degrees, one showing -30 degrees... although that's just one possibility. Maybe the best thing to do would be to let users configure the number of monitors and the types of views.
On the other hand, this is such an obvious partnership that he may indeed want to bundle things together more formally. I have used Hardy's products since 1999, and many of us in the community have been waiting for someone to come along with expertise and passion about "world simulation" to complete Hardy's passion for aircraft simulation.
FWIW, you are indeed correct that the Aerowinx forum is a bit disorganized right now. He was clear early on that the forum in it's present incarnation isn't supposed to be the public face of his marketing operation. Rather, since PSX is still a fairly long way from release, the forum is mostly a place for ongoing conversations, mostly among previous users. There are also reports here and there from alpha testers. I think the forum will get more organized as he gets closer to releasing his work.