Over the past decade, there has been a notable surge in the fascination surrounding the development of immersive urban environments. Following the widespread adoption of the concepts like the metaverse in 2021 and spatial computing in 2023, there has been an exponential surge in interest and fascination surrounding this ground-breaking mixed reality phenomenon. In the realm of mixed reality, mixed reality (MR) on mobile devices serves as a transformative medium, seamlessly integrating virtual enhancements into the fabric of our physical reality. This cutting-edge technology empowers users to effortlessly tap into a myriad of services and pertinent data, expanding their experiential horizons to unprecedented levels. In order for MR to be effectively integrated into our urban environments, it is crucial to address significant user-centric challenges that lie ahead. In this chapter, we delve into the realm of cutting-edge research that provides valuable context for the emergence of immersive cities and the intricate dynamics of stakeholder engagement within the mixed reality milieu.