Is it possible with Android Wear not to share all notifications with a connected wearable device? E.g. I only want only be notified of new SMS messages on the Wearable Device but not of all the other stuff?
Edit: Would it be implemented in the Smartphone App or in the Wearable App?
The Android Wear phone app already allows you as a user to control which apps push notification to your Wear device (Android Wear app -> Settings gear in upper right -> Block app notifications).
If you mean as a developer for notifications you control, you can use setLocalOnly(true) to make your notification only appear on the phone and not a Wear device.
If you mean as a developer wanting to control other application's notifications, no you cannot control which notifications bridge over to Android Wear devices, although you can cancel notifications altogether if you implement a NotificationListenerService (that would cancel them on both the phone and Wear device).