RFID proposed as method to observe shopping behavior

CNet Asia is reporting that the Tokyo Book Fair has a demonstration showing the use of RFID (Radio Frequency ID) technology to track shoppers within a book store.

The concept is to station the receivers on shelves, so that you can see where the shoppers go while browsing for the next book.

Of course, privacy concerns abound, but retailers love the idea of being able to figure out what user's shopping habits are.