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It’s been many years since media began talking about the wonders of the IoT scenario, where a smart fridge checks the milk expiration date and automatically compiles the shopping list, but in the real life how many people have this smart fridge in the kitchen? Yet the interest around the IoT scenario is growing every day, so in this paper we try to figure out if IoT is science fiction or a real revolution. In particular, we describe in simple terms the IoT scenario, what can be done with current technologies, what are the main obstacles that limit the success and the wide use of IoT and we highlight directions that can make IoT a true reality.