Edge case here: my hands are constantly dirty with things I don’t want to get on my phone (relevant hobbies include machining, gardening and calligraphy). A smart watch means I can check to see if a message is important (ex: kids/partner attempting to get ahold of me) and I can answer calls just using my nose/tongue + TTS. I never understood why they were such a mainstream accessory, but they are very convenient in some circumstances.