The document discusses using cities as living labs for experimentation through urban labs. It provides examples of pilot projects tested in Barcelona's 22@Urban Lab, including LED street lighting, electric vehicle charging stations, and traffic sensors. Urban labs allow testing innovations in real-life environments with citizens to improve products and bridge relationships between companies and cities. Apps are discussed as a way to connect citizens and reinvent citizenship through sharing and finding resources. A platform approach is suggested to leverage resources through co-development rather than a zero-sum, in-house approach.