A clear channel billboard (roughly phonebooth size) in my area of London has a screen and a camera, it projects locally personalised ads for, among other things

A clear channel billboard (roughly phonebooth size) in my area of London has a screen and a camera, it projects locally personalised ads for, among other things, a popular lager beer saying it’s available at a bar 30-100m away. I assume they’re all networked - and gathering literally all of the above.