Well, I am sorry you used a loved one as an example because you struck a nerve that Smart Watches "can monitor one's health." To me this is a just silly. If an electronic device helps your dad, that is great, but he still represents in statistics, an "N of 1" or one data point that has no bearing on measured outcomes.
As an augmented Smart Watch-Phone (accessory at this point), they will someday have value when they can be worn 24/7, are water proof, usable by a generation that requires bifocals, and not just a novelty. They will not measure blood pressure without an inflatable wristband, measure pulse ox without a skin fold, determine an ECG without at least 3 limb leads, or check blood chemistry without years more in research.
A GPS enabled pedometer has a motivational value in exercise, but just doesn't quite make it to the panacea level of living a healthy life-style.
The technology will get there in 7 to 10 years as will the advertising hyperbole of the Super Smart Watch.