Here are three big areas to watch at Google I/O -- and one big problem Google needs to solve

Later this morning, Sundar Pichai will take the stage in Mountain View for his first I/O developer conference as CEO of Google. And he will reiterate many of the points he laid out in his first founders' letter -- that Google believes artificial intelligence is the next foundational platform in tech, after mobile, and that Google is well positioned to win. He and his executive underlings will also have announcements to share. We are moving to a world where smart, interactive machines surround us -- our homes, cars, offices and (of course) phones. Google wants to be there; that's Google's bread and butter.