Hangouts has been perhaps the most innovative feature of Google+, and I think Google should capitalize on its success because it can turn out to be another one of its products that people love to use all over the world.
To use Hangouts, you normally need a Google+ account, and you can only use it inside the Google+ website. But Google has implemented Hangouts in Gmail by replacing the old 2-way video-chatting feature in Google Talk, with the 10-way video-chatting from Hangouts. There are also other technical changes that are supposed to make the service more reliable and offer higher quality videos:
Unlike the old video chat, which was based on peer-to-peer technology, Hangouts utilize the power of Google’s network to deliver higher reliability and enhanced quality. You’ll be able to chat with all the same people you did before and, in fact, with Hangouts you’ll now be able to reach them not only when they are using Gmail but also if they are on Google+ in the browser or on their Android or iOS devices.
Hopefully this is just the first step in unifying all of Google’s messaging products and in turning Hangouts into a much more popular and competitive product against its arch-enemy: Skype. Watch the following video to see how it works.