I've seen a few postings from Android Wear developers asking about problems with some users having devices where Google Play Services on the Android Wear device is out of date (typically version 8.x instead of 9.x).
You can determine your version on Android Wear by going to Settings ... About ... Versions ... Google Play Services. It should start with a 9, and not 7 or 8. If it is 7 or 8 you have a stuck device.
I'm trying to understand what the cause of this problem is, so we can get it fixed. Most developers don't have the problem on their own devices, but occasionally they are being contacted by users of their apps who are reporting problems. If you hear from a user with a problem, I would like to get a bug report from them so we can analyze and then help fix it.
We need bug reports captured from both the phone and wearable side. So if you have a USB cable and watch cradle, you can run "adb bugreport > phone.txt" with the phone plugged in, and "adb bugreport > wear.txt" with the wearable plugged in. There is also a bug report mechanism which can work over Bluetooth, outlined here: http://www.androidpolice.com/2014/08/27/android-wear-app-update-adds-a-confusing-way-to-report-bugs-to-app-developers-support-for-ambient-light-sensors/
Once you have a bug report, please send them to me directly, do not share them in public since they might have private information in them. Ping me on hangouts and I'll send you my email address. The quicker I get reports, the quicker I can work on getting a solution for this. Thanks!