I heard that GMail contacts and Google+ is integrated together. It is a sign that Google is going to be a one site.
Sooner Google will merge Google+ messages and Gmail. Sometimes it may not happen. But now Gmail chat and Google+ chat are same. Contacts are also same. We know that facebook integrated messaging system with chat.
After few years Google will be a one service which satisfy our all needs. You will not need to go to Gmail or docs or google+ or search. It would be a one site.
Now we should go back. We should develop programs which consume little bit memory. We should design websites which can be accessed from dial-up. It is time to go back. Future should be more faster and easier. Everything should be tiny.