Indeed, who will we become when our thoughts are shared, we will have no need to talk if we can use our minds to interface. We would still feel all the emotions and think all the crazy things you wouldn't say out loud. If our thoughts could be read, there would be no more secrets, and nothing could be hidden. It would of course depend on the powers behind the AI, and where they choose to take us. It would certainly make surveillance and control a lot easier. With an AI reading all the thoughts of everybody connected to the system, quickly dealing with anybody not conforming. I think over time we would lose the identity to the body as it would become just one perspective in a system-wide synthetic hive mind. Of course that's just one possible outcome ;)