People are married to their cell phones. If there was a way to have those things surgically implanted onto our faces, we'd do it. Imagine, the high you'd get if you could inject macro-doses of seratonin, endorphines and whatever else happens when you're staring at copies of your own self image non-stop. Brain chemicals are the new street drugs.
On the trolley, this one lady was on amazon searching handbags for 50 minutes - none of them were good enough. When people are done texting, they move on to digital solitaire - the game you play just before assassinating someone. I'm typing this shit while looking at a screen, right now. WTF. I'm glad the human race has figured out how to harness the power of discontent and paranoia to keep the economy running, but the population of hungry ghosts is quite tiresome.
Later on: When the train arrived to board passengers, these two dipshits decided it would be a good idea to walk, in tandem toward the door, while staring at their phones and then stopped immediately in front of it. This action subsequently blocked access for everyone else attempting to board. Good thing their addiction to screen time is enhancing their situational awareness.