Well, each case is different. Apart of the technological, nerdy wonder you have to see if it fits your needs and wants. It might, it might not.
I was unconvinced by the AW at first. Actually, I still don’t have one. However, given my wife’s job (special ed teacher) I decided to give it a try and I bought an LTE AW3 for her. At first she told me to return it as “useless”, and I told her to try it for just a full work week. Result? She can’t live without it now. Literally, she does all her activities with it. It also helped her greatly with workouts, keeping track of things, being in contact with the world while she can’t use her phone due to her job, and even with the find my iphone feature (she forgets her phone in the purse, or somewhere around the house). It keeps track of her sleep, her general health (although we DO know it’s not a substitute for a doctor), it helps with the reminders and so on. Even the GPS is somewhat useful. The AW transformed her life for the better.
Now, is an AW a tool that everyone should have? Nah. Is it a great tool to have availavble? Heck yeah.
I am not really interested in an AW myself as I am kinda of a digital minimalist (zero notifications, just a few apps, empty iPhone screen etc.), but I do have a heart condition. Nothing huge, except that I had open heart surgery at 17. Am I at risk of dying? Most likely not more than anyone else (I mean, 100% sure that we will die somehow... but my heart does not require superextra attention or medications). However, since the new AW is coming out and my wife really uses it and loves it, why not? I’ll buy the AW4 for her, I’ll get her old AW and I will also keep monitoring my heart, sleep, excercise (or, lack of thereof) and so on.
As with any technology, any tool, or any machinery, it’s all up to each single case.