CCTV has been going for yonks. Pre Millennium at Goodlookers (IIRC the parlour below Penny's when Penny's on the opposite side of the road). They had a big mirror in the hallway that had what looked like a smudge mark on it, there was a covert camera hidden behind it that was wired up to an early PVR system). Men would come along and preen in front of the mirror much to the amusement of the staff who were watching. Penny's when they switched to over the road had recording, most places do. Most places have the equiv' of ring doorbells now, I suppose robbery is more prolific.