They made mention of WatchKit in the keynote. It sure looked like there were third party apps on the devices demoed. (I think I saw a Path logo). It's not clear if these apps are sort of accessories that can be embedded in iOS Apps or watch specific apps.
Reading between the lines the impression I got is that the WatchKit API will let you define widgets that come with your app and that will be downloaded to the watch when the App is installed on the iPhone.
I think this shows there is an ecosystem- it's the App ecosystem and it's the most vibrant one out there. But it's not exactly the same (which may be the cause of the parents confusion)
