Smart Rings, reckon they could do better than Smart Watches?

So I've seen this Smarty Ring concept, and it looks cool. Not sure if it'll be as intuitive as a watch would be, but I can see the benefits. More conspicuous, no expectations regarding clock faces, and can be purely for notifications, without wasting space.

What do you reckon? Could this be the solution to wearable technology?

Source: http://smartyring.com/