There is nothing wrong with XMPP, but it is an instant messaging and presence protocol. Google started adding point to point video and audio calls which is a h

There is nothing wrong with XMPP, but it is an instant messaging and presence protocol. Google started adding point to point video and audio calls which is a hack that doesn't work well when you want to incorporate video/audio conference, route calls to the PSTN (E.164) dialing, provide calling features (transfer, call forwarding, call waiting, find me / follow me). That is why there is SIP. Google has acquired SIP providers and I understand that their Hangouts backend supports SIP, so I do think they were going to introduce this capability to their environment, but I hope that they are going to stick to an industry standard here as it allows people to choose the endpoint that best meets their need. Time will tell...