The document discusses the concept of smart connected cities and how digital infrastructure and internet of everything technologies can enable smart city capabilities. It notes that everything will be connected by 2050 with 50 billion connected devices and that application-centric infrastructure will be essential. It describes how smart city services across different domains like transportation, healthcare, and energy can be integrated and outlines the benefits of smart sustainable communities like reductions in crime, traffic, and resource consumption. Finally, it provides an example of how Cisco has helped the city of Barcelona create a smart city that generated billions in value and thousands of new jobs through integrated smart services and technologies.