I find I use my watch regularly where a phone would be unsafe or inconvenient, like preparing for a walk in the morning, controlling music in the car, and dictating immediate responses to incoming texts. I still bring the phone, but don't really interact with it.

The watch is always on my wrist, even when I abandon the phone. I think of it as part of the phone, actually... more like the mouse I attach to my laptop than the laptop itself. It's the piece of the phone that I drag around, even without the phone.