Cities of tomorrow are planning smart itineraries for the urban future, adopting a smart city view to support urban innovation by fostering collaborative processes for sustainable urban growth and quality of life improvement. As smart innovative communities, cities are adopting a smart city framework to urban planning for innovation. A smart city helps to shape the city of the future an engine of urban innovation, a space for collaborative and organisational innovation. Cities are organising smart innovative urban communities, planning a smart city framework for social urban growth. The European cities are defining smart urban planning, enabling the smartness an ability to shape organisational and collaborative urban spaces that support social open innovation. Sustainable urban future relies on cities becoming smart communities that support urban innovation for good life, promoting collaborative and multi-actor innovation, following a human-centred approach to smart urban development, and promoting a smart city vision and community to urban growth.