I won't get a smartwatch until they have a matching smartring. Before I exert the energy to look my watch, I want to know if the incoming is worth it. A ring could tell me if it's a text, email, voice, pic, etc. If it's something I want to see, I'll flip my wrist to look at it. Then I'll decide if it's important enough for me to really expend the energy to reach all the way into my pocket to retrieve my phone.
...technology is so exhausting