i lost my phone and waited a couple weeks to buy a new one...
so while on the bus or walking down the street, my head was up observing people.
as you say, it's like they were under a spell, and I just started noticing because i wasn't under the spell .
funny enough it was some of the homeless on the bus that were still greeting each other with smiles and enjoying the bus ride, i assume because they didn't have a phone and recognized each other from the neighborhood