My number one priority for a smart watch is not to replace my car keys and wallet, although these are the type of things I do expect any wearable I purchase to be capable of doing. No, the highest priority of a smart watch should be to replace my need of carrying around my phone everywhere I go. Second highest priority needs to be the ability go and do things with your watch without having to worry if you need to the your charger along too. In other words, I'm not convinced smart watches will be for the masses (one the novelty wears off) until the wearable is independent of a second device and can go for days without charging.
