In your opinion, what has been the most exciting use of artificial intelligence this year?

"I have been reading a lot on smart city schemes and am fascinated with the plans for self-driving, autonomous, shared vehicles. I have also read that; in this smart city, robots would take on tasks such as mail delivery. Once the structure is there, cities will be able to build on the concept but making it their own, and customizing needs based on population, and existing infrastructure."