I would be surprised if it became popular. Perhaps it doesn't have the features of Hangouts while it does have the requirement that you install another app and

I would be surprised if it became popular. Perhaps it doesn't have the features of Hangouts while it does have the requirement that you install another app and the stigma of it being a Google product (i.e. they collect all your info). Also lacks messaging capabilities. It can only be used for very short 1 on 1 phone calls since I can't imagine video chatting for a long time from a phone. Also it can't be used with a desktop. Otherwise, Skype and Hangouts are way better plus any decent WebRTC P2P chat like www.appear.in