SCREENSHOTS OF THE EVENT WITH EXPLANATION OF HIGHLIGHTS
presentation of G+ new features was really easy to watch. You may want to watch the video below, (it starts at 13:00).
Vic explains very well what is new from today for the 500 Million active users on G+ starting today.
Basically there are three areas, as you can see in the photo below
SNAPSEED NEW FILTERS
And add the music to it (that can also be picked automatically by +Google+ based on the video)