Personalized technology is now getting even more personal.
New accessories include items like music players that match songs to heart rates and mood sweaters that change color depending on your emotional state.
A popular new item: wristbands that work like smartphones but can also track heart rate and skin temperature.
Tech entrepreneur Manish Chandra said anything that makes our lives simpler and brings the interaction closer is going to succeed.
The market for wearable technology totaled about $9 billion last year. Experts predict that could be $30 billion by 2018.