When it comes to keynotes, you can't get any bigger than POTUS. On Friday, President Barack Obama kicked off SXSW Interactive with a conversation with Evan Smith, the CEO and Editor in Chief of The Texas Tribune. And while this might mean that SXSW has officially gone "mainstream" (is that really a bad thing?), the Prez had some interesting and important things to say about everything from the tech industry to, you know, that whole FBI vs. Apple case you may have heard about.