According to Apple’s website, the WatchKit Developer toolkit has been release which allows Developers to start integrating the Smart Watch into their app. The Xcode beta has been release for the development of the WatchKit and by using the beta version of iOS 8.2.
Even as the Apple Watch is not release, developers are able to feel the watch digitally and have a feel of its capabilities.
The new release doesn’t allow developers to go too deep into Apple watch as only notifications and glances are up for development. They have to wait till 2015 before they can explore fully into Apple Watch apps.