Addind the electronic components don't worry me too much...but it depends on the implementation. If they add a smart-card like component to it, there's no real concern there. It's an additional means of verification that requires they have physical access to my passport to view.

The RFID, on the other hand, is a bit concerning...I don't like the thought of someone being able to track me from a distance by the RFID embedded in my passport.