It's very clear. Words like "green", "smart", "open source", "internet of things", "connected" and more will get the city manager's attention. But I would refrain from stuff like "big data", that still has a negative impact for a lot of people (companies collecting my private information is also big data).
Do mention that the internet of things is changing our lives in a similar way television did and internet does.
It might help to mention some success stories, like water height measurement in England, the trash bin example (what about trash bins in shopping malls) . Another nice use case is the Mobilock bicycle lock (sorry, site is in Dutch only). This is a bicycle lock for rental companies. Users can reserve a bike, unlock it at their location and lock it again at the destination for another user to become available at that point.