By many indications, signs, and signals there is writing on the wall: the Internet of Things (IoT) is coming! In this closing statement, Kemal Delic briefly reflects on two possible developments for the IoT and concludes with a third, and more likely, scenario.

This paper aims to provide the view of what means IoT (Internet of Things) in energy efficiency applications, of its technical and business impacts, of its opportunities and risks for the different market players. It is concluded by the author's long term vision about the use of IoT in energy efficiency applications.

At the very high level of abstraction, the Internet of Things (IoT) can be modeled as the hyper-scale, hyper-complex cyber-physical system. Study of resilience of IoT systems is the first step towards engineering of the future IoT eco-systems. Exploration of this domain is highly promising avenue for many aspiring Ph.D. and M.Sc. students.