My parents for example both have iPhones, but neither of them would wear a watch unless it really had some extra special usefulness. What is the killer feature? I feel like the Pebble has proven that the killer feature is not that obvious because a lot of Pebble users say they stopped wearing it.
I imagine Apple will take a similar life-data approach, especially with the rumors around Healthbook (http://9to5mac.com/2014/03/17/this-is-healthbook-apples-firs...).
Much more likely is that we'll finally see an Apple TV SDK. If there is an iWatch this year, my money is on it starting out as a "hobby" just like the Apple TV did (and is presumably about to graduate from).
2. An iPhone, unlocked from Apple in the US starts at $649.
3. An iPad Air, from Apple starts at $499.
They will showcase the platform to develop apps for the iWatch.