- On demand resources:
- "Bitcode. Archive your app for submission to the App Store in an intermediate representation, which is compiled into 64- or 32-bit executables for the target devices when delivered."
- Objc generics
- Run apps on device without a paid developer account
- Watch OS 2.0: native apps
Sources:
- What's new in Xcode 7
- What's new in iOS 9
- What's new in OSX 10.11
- Watch OS 2
https://developer.apple.com/library/prerelease/watchos/navigation/