Late yesterday, Google began rolling out an update to the Android Wear companion app. Despite a sudden growth of over 2 MB in size, the app only seemed to change the text of a warning, and there were no visible changes on our watches. We knew there had to be something great hidden under the covers, and we were right. The companion app certainly has some interesting changes of its own, but it also acts as the delivery mechanism for a Wear-customized version of Google Play services, and there's a bit to talk about in there, too.