It's real. It's just matching the patterns created by your facial features. I"m not sure if Vegas cameras are actually doing that or if they would be connected to some kind of ID database, but the technology exists .I BELIEVE that the British Govt using some kind of technology like that in their public surveillance cameras. I THINK they do that, but I know that the ability is there. I had thought that TSA was going to role out something similar at the airports to look for bad guys or something.
OTOH, I've been drinking tonight.