Visitors to a Stockholm hotel will be able to use their mobile phone instead of keys to unlock the doors to their rooms. Before arrival and have their phones activated as "keys." They will then be able to skip the registration desk and unlock the door by holding the phone next to it. The short-range radio technology, known as Near Field Communication, is expected to be built into smart phones in the coming years. It is also envisioned for ticketing and card payments.
I think this is a good idea but we rely on technology to much for our own good. If we use technology for everything then we will completely go insane when technology crashes. The idea of using the phone for a key of a hotel room might make it more easy to break into. This does save on plastic and recycling is very popular now days.
http://www.msnbc.msn.com/id/39976610/ns/technology_and_science-wireless/
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