Perhaps there is some sort of mutant safe haven someplace, where those that survive are hiding together for better protection.
This ad may explain a lot about the setup of Logan that we didn’t previously know.
We also have seen that a large part of the movie will follow our main characters as they do a lot of driving.
We knew that the movie was ultimately about Logan and Professor X protecting the little girl named Laura but it wasn’t entirely clear exactly how they were planning to do that.