Ron wrote this before Apple Watch Series 4 was announced.
First, an always on, constantly tracking heart rate monitor. Second, built-in electrocardiography.
#1 is in Watch already, #2 comes with Series 4. What about #3?
Blood glucose monitoring– would be truly revolutionary; something along the lines of a health and high tech holy grail. Over 100-million people have diabetes and a few hundred more are in danger.