Or replace it with Google Chat, for that matter. This blog post is not insightful. Both Google and Facebook have been doing what he's talking about for a long

Or replace it with Google Chat, for that matter. This blog post is not insightful. Both Google and Facebook have been doing what he's talking about for a long time. WhatsApp is not really a game-changer in concept. It's a game-changer in terms of user base, if anything.