David Smith outlines what he expects from a two-phase rollout of WatchKit. It's great information. What caught my eye, however, was his conclusion:
I couldn’t be more excited to get started. Like I said yesterday I’m increasingly convinced that a device of this class will radically change how I interact with my iPhone. I have a long list of ideas for how I could enhance my existing portfolio with the first phase of capabilities (along with a few new ideas). Then an even longer list of ideas for what could be compelling native apps to build next summer.
I'm reminded of the enthusiasm leading up to Apple's release of an iPhone SDK :)