I'm genuinely curious what similar goal an Apple Watch achieves
Essentially everything you'd want from a dumbphone, small screen, no real apps, basic phone functions and maybe email.
I am actually thinking I might pick up an LTE apple watch in a couple months when the next generation comes out, exactly for the reason of leaving my iphone at home pretty often. Less distraction, less willpower required to stay off it.
Although I don't know if it really fits the bill. You still need to pay for data access, it is far more expensive, and no private calls without some bluetooth headphones.