This level of fidelity is amazing. After reading Unigine info page I realized that Outerra actually has a really strong competitor...
Gotta look out for them!
One thing that I noticed about them is that they have a very small community of fans, I'm not even sure if there is one. They do have a private forum which I guess is for communication with project partners. Lack of the fanbase is probably because of the fact that they don't really have THE game in works (or at least showcased), as their primary focus is development of the engine. And there is really no demo which anyone could download and check out on their system, you have to give your personal information and project description for that. Meh...
Although they got technical capabilities that likely exceed that of OT, I like Outerra's business and public relations model a lot more...