No longer an emerging concept, the approach and application of the smart city is evolving rapidly. Over at Iambente, Boyd Cohen describes the three generations of smart cities that now exist. Beginning as an industry-led, technology-driven initiative, urban leaders quickly grasped specific applications for this approach, leading to the city-led, technology enabled smart city. In the past year, perhaps inspired by efforts in cities like Medellin, twinned with the sharing economy and pushed by slow economic growth, citizen co-creation has emerged as the third generation. Harnessing the potential of all residents will make cities even more innovative. The next generations of smart cities may be the most interesting and dynamic yet.