From an chat with one of their employees, my understanding is that they have a nice SDK to make it easy for people to write simulations thay scale well, by enforcing some constraints:
Dependencies between agents are local and can be expressed by simple messages
Low dimensional and smooth action space
Simple per-agent dynamics
From what I've heard it isn't going to revolutionise anything, but it might make more massive open world space MMORPGs which I'm strongly in favour of.