Lets be fair, from their point of view Cupertino is the center of the universe. Northern California is relatively sparsely populated, which is why they tossed that in and why they skipped the more challenging bits of California in the south. No offense, but from what little I know about Eureka, it is a smallish provincial town stuck somewhere in between the Seattle/Portland area and SFO. And as such, one of the larger settlements you'd encounter on the way from one to the other.

Going from there to country wide, continent wide, and ultimately global coverage is going to take a lot. Apple certainly has the financial means to do so. But it's not necessarily going to happen this decade.