Image courtesy.
Was amazed when I read this, especially as the possibilities are infinite and somewhat scary. Imagine walking down the street and suddenly hearing a voice in your head inviting you to take advantage of this week's BOGOF in TESCO? Freaky. They'll never allow it but it could work really well for some guerrilla marketing although the equipment took 10 years to develop and is going to cost more than just getting 20 flunkies to spray clean all the pavements in the area instead.
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