Wrapping up - Time for Q&A

This has to be one of the shortest, snappiest product events Facebook has done.  Started 30 minutes ago, and the formal part is wrapping up.  Time now for questions from reporters.

What about group chats?  Zuckerberg is saying we're just announcing one-on-one video chats now.  I wouldn't rule anything out, he says.  The intimacy of one-on-one chat is powerful, says Tony Bates of Skype.