The Flight Simulation community is i'm sure a multi million dollar industry and to be a part of that in a new era of visuals you would have a monopoly and even outrun Microsoft Flight. Simmers want serious and a professional experience with the micro details available to them.
I'm not so certain of that anymore. From my 12-years of gaming experience, both in Flight Sims and other genres, I'm seeing a fundamental shift among developers and audiences in the nature of gaming. First Person Shooters used to be the rage, and everyone copied them. Then Real Time Strategy was the rage, and everyone copied them. Then Sims were the rage, and so on.
I think what we see is that the disparity of genres has created a niche set of groups, who look for one particular thing in an engine, not matter what it is. Outerra is unique in that it has the potential to satisfy ALL niche groups, and bring them closer together.
Imagine and RTS game, that you can play in FPS style, and then hop a plane sim-style, to get to the next battleground. Imagine getting to the battleground and building via a sim-style interface, your fortifications, and playing both RTS, FPS, and Sim, all in one. That hasn't been done before, except in a rudimentary scale.
Ultimately, Anteworld the Game will be a combo of all of this, and a platform that could host all styles via portals (similar to how Second Life runs). I'm envisioning a possibility that Outerra could be sort of an "operating system" on which multiple games are based. Just click on the style you want to play, and voila! You're there. In this way, it could cater to everyone, but it would need to have the backing of a community, as well as several developers.
I also see entities such as NASA and military around the world wanting it for simulation purposes. In NASA's hands, they could pre-explore potential planets for landing zones, by inputing their own height data into the engine. Imagine a pre-flight training sim where an astronaut landing on the Moon or Mars could literally VISUALIZE down to 2cm detail where he was supposed to go. Survival just increased 90%. Imagine a soldier in the back woods of some obscure country, having done a simulation at this level of detail. Again, he knows the terrain as if he'd already been there, since he's been trained using the Outerra engine.
If I was either NASA or military, I'd be jumping on this engine in a heartbeat, for what it could provide.