The truck in the room are cars, not phones. And cities built over the idea that you must have them. Walking even in a more or less urban scenario should be something usual, enjoyable, part of our everyday life. Instead most people must have a car, have everything too far away from where they live (or just drive a few blocks instead of walking). Cities built around walkability, with trees, parks, benches and so on, with most of what you need at 15 minutes away from wherever you are, may make part of that flaneurism an everyday experience.