Google+ Hangouts On Air go full-screen, put hosts front and center
 

Even with tweaks for musicians, Google+ Hangouts On Air have had sub-par layouts for presentations and performances; one-way stream from a band or teacher crops the view to a smaller size. As of a quick update to the social network, common sense prevails. One-way performances now default to occupying the full available view; multi-participant chats can go a similar route by using the Cameraman app to push all but the primary speaker to the background. It's a simple change, but one that could make a big difference for those who just want to lean back and watch.

http://www.engadget.com/2013/01/12/g...o-full-screen/