Product manager speaking. Claims many publishers aren't aware of how much of their media consumption is done on mobile devices like tablets and smart phones. It's already a multi-device world and getting bigger. Adapting to this is one of Google's focuses this year.
On AdSense side
Admob is for mobile devices. Otherwise use AdSense for mobile ads. Speaker encourages publishers to review how much of income is from mobile. One of Google's goals is to help publishers dial up that kind of monetization.