Olivia Solon in San Francisco, Saturday 23 April 2016 Facebook CEO Mark Zuckerberg delivers the keynote address at the F8 conference. Facebook’s CEO, Mark Zuckerberg, delivers the keynote address at the F8 conference. "If live video is Facebook’s phase four, then artificial intelligence and virtual reality look like being big parts of phase five. Both of these fit its strategy of monetising as many of our social interactions as possible."