Wow! very interesting read. However... I think that Twitter has and will continue to be an essential tool in broadcasting unfiltered news from anyone around the world in time of crisis: e.g., the Arab spring and Japan Tsunami. In both instances, I got the very latest emergency news from Twitter and no one else. I am not sure Google+ will replace this aspect of Twitter anytime soon. I do think it's possible that Google may eventually purchase Twitter and continue to offer real time news to the world and embed it in real-time search.