Neat toy, but it looks like it needs a phone to use data, install applications and so on. Personally, I'm not the type of person that wants to wear another accessory. I used to need a watch. I don't need a watch that needs a phone. Just saying.
I see this as a sample of what's to come from mobile technology. I prefer that phones evolve instead of adding a new accessory.
I agree in that I also don't need a watch, much less a watch that needs a phone. But I imagine I will wear a watch-like device again in the future. Have you ever heard about the expression "the internet of things"? Well, it is going to happen, but we're not quite there yet [1]. And when it happens, I bet we're going to navigate trough it using watch-like devices at first [2]. It's more natural because the watch in one's wrist is much more accessible and therefore has a much lower latency then the phone in one's pocket.
Today, the precursor of the internet of things is the internet of smartphones. So Pebble uses a watch to navigate the internet of smartphones. When the internet of things finally comes, they'll be in a very nice position with experience and brand recognition.
[1] The signs are here though: arduino, raspberry pi... How long until we have a low power 5 dollars board that we can put anywhere? How about a 1 dollar board?
[2] then we'll use augmented reality glasses and finally we'll just implant chips and be ourselves part of this internet of things.
I see this as a sample of what's to come from mobile technology. I prefer that phones evolve instead of adding a new accessory.