Yeah, the features in the Japanese market are mostly due to the ease of expanding infrastructure. I remember getting a plan with Au that only had the good features in the Tokyo metro area. That was fine, as I never left that area. Millions of other people were in the same boat. Maybe they left the Tokyo area once or twice a year, but other than that, never.

In the US, that would never fly. The people that are willing to pay for the features need them to work in all the "large metro areas", which doesn't mean "Manhattan" but rather "suburbs of Phoenix" and so on. This makes infrastructure roll-outs very expensive, and it's why they never happen.

(Incidentally, people in the US and Japan have similar commute times, but the population density in the US goes down a lot faster as you move away from the city center. In Tokyo, it's densely packed until you get to the mountains.)

Population density has its advantages; look at everything Japan has that the US doesn't (100Mbps internet for $20/month, interesting cell-phone features, amazing rail systems), and population density explains it all. But then, they don't have 5 bedroom houses for $150,000, either.