From an article in the Washington Post about the impact of mobile/cell phone technology in the Congo:

Worldwide, there are more than 2.4 billion cellphone users, with more than 1,000 new customers added every minute, according to industry analysts. About 59 percent of users are in developing countries, making cellphones the first telecommunications technology in history to have more users there than in the developed world.

Could this be the big tipping point in technology? And the reason: It is cheaper to build cell towers than to lay copper wire. And since there are more people where there is little old copper infrastructure, this is only going to increase. Which in turn has got to mean that the cultural mores of Africa, India, China etc are going to start to be the drivers of what we see and consume on mobile within the next few years...