Computing is undergoing a dramatic shift from fixed-location desktop and nomadic laptop systems to mobile devices, networks, and applications. In 2011, the number of smartphones sold worldwide exceeded the number of personal computers sold for the first time. Only half of Americans have smartphones so far, so the trend will continue for some time. One day appliances and other devices will come to have smartphone capability built in, so the number of “smartphones” will exceed the population many times over.
New users will use mobile social networks, among other applications. Last week, Fac