ignorance is bliss. Nike FuelBand or Garmin Forerunner does not have "biosensors". You are so clueless you don't even know what 'biosensor' is. I doubt you know what 'bio' means because you wont use it in your post. That right there should me the end of my post. but I digress.
There are not many things a small device strapped to a wrist can do that a phone cannot. (Plus you listed one). A phone can do all those things you just mentioned; which is to track your distance, calculate calories burned, steps taken. All of that are software features, there is no "biosensors".
lol
You are hilarious tell me to take a step back seeing I'm a windows phone 8, android and Iphone developer and what qualifies you? oh yeah you are just a fan. lmfao.
Glass is miles ahead of any smartWatch technology or concept. If anyone can't see it, its because of their fanboism. If the shoe was switched and it was apple who came up with Glass, you won't be saying the garbage you spewing now.
so please save it.
Glass defies millions of years of primate evolution.
It's possible that Glass in glasses frames will be more popular, but human evolution has created a strong ability for humans to read facial expression, eye gaze, and posturing, i.e., social cognition. Glass will always intrude on that communication, making it a niche product at best.
http://rstb.royalsocietypublishing.org/content/363/1499/2033.full
Of particular interest, eye gaze directions is impaired by Glass, so social interaction is impaired. Hence the derived term, "Gl*******s"
Watches are already socially acceptable, and even the gaze at a watch communicates "it's time to leave" or "I'm bored". Still a niche, but without all the baggage that Glass carries.