After a day of using your watches, what does apple absolutely need to do for the first software update? I'm assuming it will be a while since many watches are Far from delivery... What do you think and how soon? I am a healthcare professional and I think activation of the pulse oximetry sensor through a software update would add a whole new dimension to the health and fitness tracking ability of the watch as well as be groundbreaking for researchers using HealthKit. After that I think the ability to tell someone's temperature would be phenomenal - notifications if you suddenly develop a fever!! That would take care of 3 of the 5 major vital signs... Leaving only blood pressure and respiratory rate.