> wondered what the scene would look like if we all had phones like that.

People with headphones looking absentmindedly straight ahead doing their best not to focus on anything, isolating themselves as much as possible to make the complete lack of personal space more bearable.

This is already what crowded subways in my city look like when you pass the threshold where people are too cramped to browse their phones. This is not a bad thing, just a coping mechanism.

I think there is much more room for behavior change if you consider people at a table (coffee or restaurant) with and without phones suitable for continuous media consumption or social network interactions.

Sure, I didn't imagine a utopia of joyful people talking to strangers. That's not what public transport ever looked like, but I do miss the times of a bit more diversity in how people spend their during the commute. Newspapers, books, handheld game consoles (which don't constantly shove ads in front of their users).