Up until a few years ago, interconnected devices were more dream than reality, and it’s easy to feel like the fitness tracker fad was the beginning of wearables. In reality, of course, the groundwork was laid decades before— years even before the Internet was launched. With all the amazing potential for wearable IoT devices, it’s important to realize how far we’ve come—and how many devices didn’t end up changing the world, but did make important contributions to the future of IoT