Visions for future cities capture our collective imagination. Throughout the history of cities, we have projected various futures for how we might want to live, work, play and share resources. These futures are often visualised by architects, artists, designers, film makers and urbanists. Embedded in these visions are ideologies and values that suggest particular types of collective life, mobility, and environments. Whether we realise it or not, visions for future cities significantly influence how we think about the present and what we do next. As we face great uncertainty and huge challenges around the world, understanding what future cities will look like and how they might shape our behaviour, and minimise our impact on the planet is now critical. Covid 19 has only served to reinforce this urgency. At present, technology-driven solutions dominate research, industry focus, and thus form major pathways and potential technological lock-in. Much emphasis is currently focused on Smart Cities without exploring all their various advantages and disadvantages. It is clear we need viable, radical alternatives if we are to meet environmental and social targets as well as economic ones. Such alternatives would enable human flourishing alongside technological innovation and may require municipal borders to be redefined and common resources redistributed to support healthy populations through shared, integrated sustainable developments. By gaining key insights into how and why visions for future cities are relevant to us now and for the generations that will follow, we can challenge our assumptions and rethink how we build our collective tomorrow.