Are you the sort to treat your wrist as a test bed for Google software? If so, today's a grand day. Google has released its second developer preview of Android Wear 2.0, and it packs more than just some extra spit and polish. It now supports wrist gestures in third-party apps, to start. While you'll need apps to take advantage of this, it raises hope that your favorite fitness or messaging tool won't require a free hand (or your voice) for navigation.