Smartwatch owner and user.
I have a Wear 2.0 watch and I love it. Battery life is the main bugbear but more performance would be good, however it's still great. It keeps me informed of all communications, I use it to control smart home tech, I use it for fitness tracking, I use it for 2fa login push and code, I use it for appointments, the list does go on.
Fundamentally it is an extension of my watch but it also keeps that in my pocket and means I can seamlessly deal with things quickly without staring at a slab.
No it's not essential but it is bloody useful. Too many of these articles are written from the perspective of people who have dismissed the technology already or don't actually use it and most of the responses are the same. The touchscreen phone was dismissed for ages as a minor sideline for years until it was successful...