An update to Android Wear means that it can now find your Android Smartphone simply by asking it.
It can be extremely frustrating when you've misplaced your smartphone, especially if it's already silent and you can't use the old "use another phone to call it" trick. Google has updated Android Wear to bypass that problem adding both voice and menu support for finding lost Android devices.
If you're happy to talk about your problems, stating "OK, Google. Start. Find my phone" should kick things into gear, while if you're more shy about admitting you don't know where in the house it is, it will also be available as a menu option. It's Bluetooth only, however, so it won't be much use if you leave your phone at work, lose it in a bar or switch Bluetooth off. As with many things Google, the rollout is going to be staggered, with availability "over the next few weeks".
Keep a watch on your phone [Android Blog]