This chapter is about the impact of IoT and AI in the design and implementation of smart cities and specifically how they are improving the quality of life in cities by making it more efficient, sustainable and liveable. It examines how smart cities have changed and what is at the foundation of smart cities-smart infrastructure, mobility and governance. IoT and AI convergence is emphasized as essential to make real-time data processing, forecasting and automation for city activities efficient. The chapter also includes issues relating to how to deploy such technologies like data privacy, interoperability, and digital divide as well as the need for collaboration across stakeholders for successful implementation. The chapter details practical scenarios, lessons learned and case studies of some cities around the world, such as Singapore, Barcelona and Songdo. Edge computing, 5G, blockchain and quantum computing as new innovations for smart city technologies are also discussed as the future of how smart cities can be created. The chapter ends with a note on the need for a more human and sustainable design, and focuses on inclusive and adaptable smart cities that can tackle the future’s challenges and create better lives for everyone.