Three years after Facebook's rocky IPO, the company has totally reinvented its business. The stock has more than doubled, and for good reason. It's gone from virtually no mobile revenue to $2.4 billion in that category in the first quarter of this year, 73 percent of its total. It's expanded Facebook's core user base more than 60 percent; more people use Facebook on their mobile devices every single day, than used the service on mobile AND desktop when it went public. And, perhaps most notably, it's expanded from just one service to a portfolio of popular apps.
So what's on the agenda for the next three years?