Developers, who have traditionally targeted smartphones and tablets, will soon have a wider playing field on which to create applications as more and more devices within the home (and outside it) get connected to the web as part of the Internet of Things. Research firm Gartner forecasts up to 25 billion "things" will be connected to the Internet by 2020. Many will be enterprise-focused but many billions more likely will be related to consumer services and use cases. In those scenarios, sensors could send messages to smartphones, tablets, and other devices--a couch could send a signal to turn the TV set on every time someone sits on it, for example. The IoT will evolve through a combination of wireless protocols, embedded operating systems and companies that bring the various pieces of the puzzle together. For more on how developers are angling to take advantage of this explosion in connectivity, and how to create apps that leverage user data, check out this FierceDeveloper special report.