The latest news from Sources are to say that Google Is About To Launch A Third Party Commenting Platform. When there is Facebook as a big rival to it. The system is deeply tied with Google's Social Network Platform, Google Plus and also use it's all Technologies.
The Google comment system will have deep links to Google’s network of services and websites, indexing comments in Google Search, and most significantly, the system will be available for use on third party sites. It is very sure that the Platform will make Google Accounts a major one in the commenting system too.
Even the Facebook has started it's commenting platform, Others like Disqus and Livefyre are dominating in the world of commenting platforms. But it will be hard for them to compete with Facebook And Google's Platform So their existence is being a question ?