You must be aware that this technology is still in its early stage and I think it's preliminary to draw conclusions now. What it shows is a potential - on the other hand it certainly lacks many of the tools needed to make sceneries for simulators, a robust API to interact with and so on. Any developer that will want to use the engine early on must be prepared to plan their development in a way that counts with our development plan, being able to implement some missing parts themselves or generally work in special mode with us. That's why we also cannot support too many developers at this time. Can't be specific as to which ones are these, both because of agreements or because it's too early to tell.
Our best course would be to make a game on the engine first, that would mature it and make more feature complete. It should be essentially a propagation/demo of the engine. While we can't aim for a flight simulator with it, it could contain flight sim components such as realistic FDM, working cockpits etc. So we are thinking about this, how to incorporate stuff that will make it interesting for many groups (yes, you car driving maniacs and planet blasters and sandboxers as well), while not burdening us too much on our path with the engine.
As for Aerosoft, I remember Mathijs Kok writing somewhere they are only now selecting the engine to be used in the simulator, and I have reasons to believe that they will be talking to us yet
However, even when they would, there are many problematic areas to be overcome before there's a
chance it could lead somewhere ...