By 2100, all of the world's 20 largest megacities will be located in the developing world, with the majority in Africa. What implications will this shift have for the future of the global economy, climate, and the welfare of these urban populations?

New players in the housing industry are stepping up with all-inclusive packaged housing in holiday destinations ranging from old-world glamour to modern metropolis and ocean cruises – not of a lifetime, but rather, for a lifetime.

With over one million people moving to cities every week globally, the world is currently undergoing the biggest wave of urbanisation in human history . As urban populations increase, future cities will also face an array of new challenges.

Do we start to see cities becoming more independent from the national states? Self-reliant cities could potentially produce up to 30% of the energy, food, water and good it consumes. Can cities provide for itself and become less dependent on the states?

Nowadays, we have Singapore, Monaco, and the Vatican as the modern independent city-states; whereas cities such as Hong Kong, Macau, and Dubai are autonomous cities - independently functioning with their own governments but are still part of larger nations.

The modular home isn't a new concept. Look at any long-term construction site, military complex, or industrial space, and you are likely to find a few. Could they also serve as the future homes for a rapidly growing human population?

The big cities of the 2020s are a fascinating market for innovations across all walks of life. Let's look at 22 trends that will likely make impacts on the future of cities. In this study, we use a comprehensive foresight tool to set up a process of anticipating changes.