There already are killer apps. Fitness is one. The question isn't if wearables are going to be a success (they already are), but just how smart and connected we need them to be: do you choose the Fitbit or the Apple Watch? etc. It seems that most objections to smart watches are due to price and size/aesthetics, both of which are hopefully only temporary issues, rather than absolute functionality. A bit of imagination is all that's needed.
> Down-vote away. I know the truth hurts.
If you get down votes, it'll be for the attitude, not the opinion...