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Of course there are a gazillion ways this kind of thing will go wrong. I'm more interested in the general phenomenon of smart devices identifying us automatically and without our knowledge.

Of course there are a gazillion ways this kind of thing will go wrong. I'm more interested in the general phenomenon of smart devices identifying us automatically and without our knowledge.

Coca-Cola, Hyundai, Samsung and L'Oréal have all signed up to the new screen, which can recognise vehicle make, model and colour to target adverts