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.
Other upgrades are minor, unless you really, really like easier access to action and navigation drawers. However, the biggest gripe may simply be finding a device to use with the preview. The software-based emulator will work on a computer, but you'll need either a Huawei Watch or the LG Watch Urbane 2nd Edition LTE to try this beyond your PC. Otherwise, you'll have to wait until the fall to see what all the fuss is about.