It's so sad that almost no one has any clue what this device will be used for. This device is all about health sensors. The galaxy gear is a companion device (a piece of garbage, and terrible use of the idea of a wearable device), it gives you messages or alerts or whatever meaningless stuff it does which will be a feature of the iWatch, but not the reason it was designed, and brought to market.
A smart person should know that a wearable device that can read and analyze biological markers with high accuracy is literally game changing. It is absolutely the next step I see Apple taking. Non-invasive glucose monitoring alone would be profoundly useful for not only the millions of diabetics, but all people (especially the overweight/obese. Not that they would necessarily have this sensor, but I remember reading they hired someone or bought a company that was working on that.
I'll give a quick example of this saving someone's life (which I did in a previous post in another thread) for the sake of opening people's minds. An elderly person wearing this goes into cardiac arrest, it instantly sends alerts to family members to call 911, or simply alerts emergency services itself. Ever see those commercials for life alert? This can be a tech that can literally save lives.