Today some ad storyboards for the Droid MAXX and Droid ULTRA have leaked. The Droid MAXX commercial states that the device will have 48 hours of worry free battery life. That is pretty awesome considering the MAXX HD had 32 hours of battery life.
The Droid Ultra commercial highlights the voice actions of the device. The date of August 8, 2013 is posted on the storyboard. This could be the release date. Nothing is official.