Have you tried sitting in a park for hours, talking out loud and seeing what happens?
If you've got the technology to enable you to seamlessly transition from working in your home to working while sitting outside at a cafe to working while sitting on a blanket under a tree in the park to working wherever you feel like it then there will be enough brave people that say "fuck what other people think" and just do it so they can enjoy being active and getting fresh air and eventually more and more people will join them. Eventually we'll reach the point where sitting inside at a desk for 8-12 hours will be the weird thing.