I think your cynicism is fair. In fact I'd go further and say I already expect people are already tracked around cities (by skin colour, facial recognition, clo

I think your cynicism is fair. In fact I'd go further and say I already expect people are already tracked around cities (by skin colour, facial recognition, clothing, travel card (for public transport heavy cities). Any digital signals (WiFi, BT) are just going to be extensions of those systems rather than anything revolutionary new surveillance measures.