Wearable devices are poised for continued growth and will change healthcare and business models. Currently, wearables are used mostly for fitness tracking but their use in healthcare is expanding. In the future, wearables may monitor health through ingestible sensors and smart devices. Companies will create new services using health data from wearables to predict disease and influence behavior. The future of wearables involves integrating data across the entire body through connected devices to improve health and personalize experiences. Wearables show potential to help people change behaviors like increasing activity and weight loss when combined with self-monitoring and specific plans. The global market for internet-connected healthcare devices including wearables may reach $117 billion by 2020.