As a community of interest we understand why open data, smart cities and IoT will create enormous economic, environmental and social benefits and opportunities. But how well do citizens understand these ideas and concepts? What responsibilities do we have to foster understanding and to bridge technical and non-technical communities in the development of open, smart and IoT agendas? We'll look at research and case studies to frame a discussion about the importance of meaningful citizen engagement and involvement in the development of technologies and services that will eventually impact nearly everything in their lives.