Layers of smartness—using technology and data—are being built into cities to make them safer, more efficient and sustainable. Developed cities around the world are actively launching smart solutions, while new and emerging cities are integrating intelligent, connected systems from the start. The big cities of today may not be those of tomorrow. The opportunities are immense—across infrastructure, mobility, energy, healthcare and beyond. Innovative technology applications and their adoption in society offer a turning point. At its core, the smart city is about people and improving the quality of our everyday lives. The COVID-19 pandemic has revealed some of the shortcomings of major cities in times of crisis.