I noticed that, too.
As concept art, it's beautiful. It's interesting to see some of the ideas that PG has for locations. I recall the concept art leak for FH2 was for Louisiana, and that would have been interesting, too. A lot of the art is done by contract artists who then put it up on their imgur or other sites as a part of their portfolio once their art is no longer useful to PG. Obviously the location of FH4 is already decided. I'm sure the location for FH5 is locked down by this point as well so they can begin on modeling all the assets and the map. So it's an almost guarantee that once location artwork leaks, it's not the location of the next game. Or the one after that.