This is for 3rd party apps -- despite the "native" 2.0 SDK, where all your code runs on the watch, it's still split clumsily into app (which you can only contro

This is for 3rd party apps -- despite the "native" 2.0 SDK, where all your code runs on the watch, it's still split clumsily into app (which you can only control by providing interface templates) and extension, which is where your code runs. The extension can control the app only through a very limited SDK that has to do IPC to effect changes in the main app. Apple's own apps don't have this restriction, and I can't see a good one for 3rd party apps to have it, either -- hopefully they'll open up a full API in the future.