Hi @tgauchat, just came back 
I added this capability to be able to target devices with as the name implies notification capabilities.
I don’t have an example yet because this was deployed just when I left but the idea is to add the capability to the device type and define the command deviceNotification like this:
def deviceNotification(text) {
// display notification on device
}
Then apps with notifications will show all this devices as options to output notifications.