Problem is ... I suspect that the Wearables SDK will be another case of Google launching proprietary libraries on Android. I have no problem with proprietary, but a lot of people think that because it's Android, it is open. It isn't. Core Android gets slimmer, Google's tie-in to your business gets fatter (unless you re-write their APIs). As an example, developers followed the location APIs in to the Play SDK ... switching from an open, core API to the Play API without fuss. It's creep if you ask me.