Biofeedback is the New Black
Biofeedback, measuring a patient's bodily functions and conveying it to them in real-time, has been around since the 60's, but has only recently become in vogue. Now it may truly become fashionable.
Merging form with functionality, this concept device lets you wear your emotions quite literally. Colors are produced based on your biometric data. It's like a 21st century mood ring that lets you see people's “colorful” personalities. From Yanko Design:
The idea is to create another way to externalize how we feel in a language anyone can understand. Someone walking down the street with flash red might be upset, in a hurry, or angry. A computer keeps track of your colors, sort of a diary of emotions that can be turned into choreographed motion graphic pieces.