Ok, some people were expecting Apple to announce iMessage app for Android when it revealed iOS 10. But thinking about it, why would Apple choose WWDC to announce iMessage app for Android, when they could probably be still working on the app and it would not make any sense to be released before iOS 10! Apple could use the iPhone 7 event to release the iMessage for Android when the app is ready. They did not release the Apple music service to Android until few months after WWDC. I am not saying they will release iMessage for Android, just saying if they have such plan, it would not make any sense to be announced on WWDC.