Electronic Post-it note?

http://www.mercurynews.com/mld/mercurynews/15055928.htm

I saw this artical and my first though was are they serious. I read through the artical and wouldn't it be interesting to have all of these chips stuck to everything, and be able to read them just by waving your phone or PDA by them. I wonder what the interface will be like to load the information to these chips. I could see it being on drivers licenses and the police have a pda with wireless technology and get peoples record instantly, or it being on a person going in the ER and the doctor being able to bring up all their infor mation instantly... which would be very useful if the person is unconsious. It will be interesting to see how stable they will be... Will they be erased when you walk by them with a magnet, or will an EMP destroy them. The artical said they are about 5 years away, so we will just have to wait. I just thought about Minority Report, where the charitor was walking and all the signs were reading his iris and changing based on his profile, and then people were able to track him based on that. Could these chips become a tracking device?