I expect the Applistas to find it enjoyable, above anything else.
I used to have a Sony Bluetooth Watch which tethered to an old Sony candybar dumphone. It was a mechanical face with a small set of alphanumeric LEDs in the bottom half which would marquee display caller ID when I got a call, show titles of received email and SMS (yes, even dumbphones did email, remember? It was just slow) and song titles if I happened to be playing music.
The ability to screen calls based on caller ID was nice. The occasional skip track in the car was also nice. I wouldn't say it was incredibly useful but it was enjoyable functionality.
Where this stops being relevant is... None of it required a touchscreen and therefore, battery life was around 2 day mark even on old Bluetooth. If I could have just what I used to have picking up notifications from my current phone, I'd be a happy man and using Bluetooth LE I'd expect a 5-7 day battery life.
Throwing a touchscreen at it just because is a huge mistake and will murder the battery (and get smeary fingerprints all over it and be set off by your jacket all the damn time). It's the same as the Moto360 having the screen off by default (thus making it useless as a watch, dammit) unless you like only having a 4 hour battery life.