It is finally possible to send message in Hangouts using Google Now voice commands.
Gone are the days of having to pick up your phone and actually type a message to your friends on Hangouts; now you can simply use Google Now to send it. All you have to do is launch Google Now then say "send a Hangouts message." It will then ask who you want to send to and what you want the message to say, then confirm that you want to send it.
That's it, it is that simple. Communicating with your friends just got that much easier thanks to one simple addition from Google.
Via: Droid Life