In this article on PSFK, I learned about how the Clarion Hotel in Stockholm is using Near Field Communication technology to allow certain cell phones to be used as room keys.
I've always wondered why room keys still exist. There are plenty of RFID key systems for cars, why not use them in hotels? If my hands are full of luggage, wouldn't it be better if I could just keep the key in my pocket and the door opened when I got close?
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