Internet of things? More like Internet of useless things, no? Next to “wearables,” the Internet of things — or IoT if we want to be cool about it — has been the next big thing in technology since tablet sales started to slow. For the past few years, the hype has been about connecting everything to the Internet, whether it’s refrigerators, luggage or even our pets. The idea is that all these things generate data, and if we can move that data around and access it whenever we want, we’ll find new ways to make our lives better and more efficient. Based on that, the market forecasts are enormous — 25 billion connected things globally by 2020, up from 4.9 billion this year, according to research firm Gartner.