Jonas sees a world in which location based systems will be able to perform analytic functions to assess your physical movements. Juels sees analytic short cuts to unique identifiers that will fully identify an individual. Both recognize that with the prospect of these powerful technologies ahead of us, old-fashioned concerns with things like the privacy protection in RFID chips miss the forest for the trees. As Juels puts it (and Jonas would surely agree): "Many people have GPS receivers in their phones and are signing up for location-based services, voluntarily (if selectively) disclosing their movements. There's little point in hiding the serial numbers of chips when your mobile phone squeals on you."
I'm not sure how to build a new set of privacy protections in the face of these massive technological changes. But I am increasingly concerned that legal privacy constructs that are now more than 25 years old cannot keep up.