Next in line: iris scan at entry, followed by tracking you based on clothes/posture. If you don't agree: try to wear and act the same as everone else?

More serious (even though I think my example isn't that far-fetched): I'm really not sure what to think of these camera and whetavere software backend slowly creeping into society. It has been predicted, definitely not everyone is ok with it, but still it just happens.