We live in an environment where interfaces are everywhere. For most of us, phones, watches, tablets, laptops, kiosks, payment systems, and televisions are all huge parts of our daily lives. And these are all predominantly visual interfaces only. Voice interfaces like Alexa, Siri and Cortana are also starting to be less of a novelty and more of a normal part of our lives. There are physical interfaces we interact with, and we are even starting to see sensory devices emerging.