Under the smart cities banner I have seen street lights that can be turned on/off as ambient lighting changes. Sensors in parking bays that can broadcast availability to motorists looking for a parking space.

Both laudable and important but in themselves just the application of sensors to improve service and not "Smart Cities".

Smart Cities involve a top-to-bottom cultural and digital transformation by central/local government, residents, businesses, visitors....  Good comment on three such cities.  

And the integration of:

• analytics- better decision making, 
• complex and cross organisation data,
  • Structured & Unstructured
  • Historic, current and predicted
  • Batch and Real-time
• Location Intelligence
• IoT
• Machine learning
• AI
• Augmented Intelligence