In the case of the AW I think utility is somewhat subjective, and I can understand being on the fence about it. Spending hundreds of dollars on something that overlaps so much with a device you already own doesn't seem practical unless you are really annoyed by needing to get your iPhone out dozens of times per day just to glance at information that the watch provides more conveniently. It's definitely a luxury, although the fitness tracking and silent notifications do provide something you can't get from an iPhone alone.
Some people don't think twice about all the times they pull their iPhone out of a pocket or a bag just to check the time, weather, calendar, or a notification. Other people (like me) are completely annoyed at having to do it. I rely a lot on notifications, and I hate it when my iPhone makes noise. And every time I have dropped my iPhone it has been when I was in a hurry to dig it out of a pocket or bag so I wouldn't miss a call. I also hate carrying my iPhone 6 in my pocket. Jacket pockets are fine, but during the warmer months I keep my iPhone in a shoulder bag, bicycle bag or in a backpack. Glancing at my wrist instead of getting out my iPhone and swiping or tapping a bunch of times is just so much more convenient to me, and those dozens of little daily conveniences add up to a lot of value in my book.
You could say these are conveniences more than needs, but there have been times in the past when I missed very important iPhone notifications that caused big problems. I used to miss a lot of notifications, but that simply doesnt happen with the Apple Watch. Oh... And I think the AW is very nice looking as well. The clean modern style is quite versatile depending on the band.
TLDR: If you aren't annoyed by having to get out your iPhone and you're not missing important notifications, then you probably don't have much need for the Apple Watch. You might still enjoy having one, but it may not seem as useful to you as it does to me. There is the fitness tacking, but there are better and cheaper fitness trackers if that is all you want. Oh... And I think the AW is very nice looking as well. The clean modern style is quite versatile depending on the band.
Sean