Consider this: Three-quarters of the world's population has a mobile phone, and within the next two years the number of mobile subscriptions will outnumber the number of people.
Consider, too, that nearly half of all mobile phones in the United States are smartphones capable of easily going online and using apps.
Now take into account that 57% of Facebook's nearly 1 billion monthly active users access Facebook on their mobile devices (not exclusively, of course).
All those number augur something big in the making. What that might be may not be exactly clear... but, clearly, the impact on social media and the mobile space will be significant.