When Google updated its Google+ app to support Mobile Hangouts it did so without allowing those virtual get-togethers to be truly mobile; its origin had to be on a PC.
That has changed today with the latest update, being pushed out now. You can now initiate a Mobile Hangout, Google’s take on social video conferencing, from within the app itself, either through Messenger or your main Google+ stream.
If Hangouts are your bag, this should be a nice little update. Hit up the Marketplace for more info.