IBM RFID Commercial - The Future Market

The future of marketing, I found this commercial really funny but the point was the message it was sending across. How convenient! Everything is RFID tagged. I suppose this would mean that the person would have an RFID tag implanted?

To me the positives are obvious, no need to queue, its super convenient. Fantastic. In a supermarket, yes.

But what about other things? If these tags are used for anything and everything. Companies and governments would be able to track whatever we are doing and wherever we are. What would happen to our privacy?