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This talk of tags is pretty laughable. Like I'm going to glue a bunch of stickers to my car and house so I can turn off wifi for half an hour at a time. Please.
Where NFC could be genuinely useful today is for use on public transport. Paris, London, and Montreal—to cite only three cities—use RFID-enabled swipe cards to ride the bus and metro. An app that allowed you to buy tickets or subscribe to weekly/monthly passes using your phone, then swipe your phone across a reader to enter the station, would be a genuine improvement over the minor hell of transit cards and recharge stations that exists now. That is an implementation that would benefit millions.
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