flâneur: a great word. when I see all these people walking around staring at their phones, I want to slap them with that word. Whatever it is on your phone, it'll wait. Whatever's happening in front of you: that will not wait, and it'll never come again.
Before phones people had ways to bury their noses still. Newspapers, for example. Let's not pretend that phones are some great big problem. Embrace it. Let people escape their daily life a bit if they want.
Newspaper are finite. Phone are a bottomless pit.
Newspapers are text and images, phone are multimedia devices running software made to keep your attention.
Etc, etc. All that lead to a “wolf in sheep clothing” conclusion on those pocket computer.