Notable to mention two other wearables launched at CES.
Scosche new heart rate monitor that measure heart rate and blood flow via the arm and not via a chest monitor.
Engadget got a look at it.
Basis have launch a Carbon Steel edition of their tracker. It another that measures heart rate via the under side of the watch. Worn 24/7 this can track sleep, activities etc etc as they say:
Beneath the surface is where Basis separates itself from every other fitness tracker. The Basis band contains the most advanced sensors on the market, continuously capturing heart rate patterns, motion, calorie expenditure by activity…even perspiration and skin temperature. All of this data is captured 24/7. The only thing required of you is to wear it.
Engadget got their hands on this (again)