Nope. It doesn't mean "reaches the most people". It means "has the most impact on the world". I think that Android will be the technology that allows people in poorer places of the world to have the internet - and thus, knowledge, and thus, power - in their pocket. That is going to change the world in a significant way.
Even something as simple as this: the internet may have information on the best way to treat sick cattle, or how to best treat certain crops. Heck, in more developed areas, it may cut the reaction time of aid services drastically.
(you already see this happening in Kenya, as linked in the article: http://singularityhub.com/2011/08/16/80-android-phone-sells-... ).