I speak here from a policy perspective(City perspective – i.e. different from vendor led talks of Smart cities)
1. How does an appstore fit in for IOT? – involve the community
2. What is the role of web technologies?
3. What is the biggest limitation to uptake of Smart cities?
4. Where does Big data fit in for IOT/Smart cities
5. How do you make a Business case for Smart cities?
6 What about the 50 billion connected devices? (IOT)
See also David Raggett’s slides on Smart cities and the Web of Things at the Media Web Symposium at the W3C blog