Wearables – Fitness trackers and health monitors are going to be all over the place at CES this year, but we're seeing advancements in the category that could make them a bit more ubiquitous and useful. Misfit has introduced the Ray, a new tracker that is just 12mm in diameter, making it easier to wear or incorporate into jewelry. Fitbit (FIT) is unveiling its next generation of products at the show. And health wearables are exploding, with everything from a patch that regularly takes a patient's temperature to a wrist-worn blood pressure monitoring device.