Some details from the tldr article...
- more personalized/helpful/useful watch faces (think next appointments, stock performance, progress on fitness goals)
- better google fit integration
- ability to download apps on your watch from a new on-watch Play Store
- make calls with your watch via cellular regardless of location of your phone
- easier to respond to messages (dictating, typing, handwriting, drawing an emoji), smart reply which suggests responses based on the received message
- Support for Google Assistant (get answers, get things down, hands free), think Siri for Android.
- New LG Watch Style + LG Watch Sport designs
- 2.0 is coming in the next few weeks
- Seemingly 100% Support for iPhone with all apps built for Android Wear 2.0
I still wear a smartwatch because I like notifications. The only thing I'm looking forward to are the watchface integrations. I wish the new smaller LG watch had NFC for Android Pay as I use it regularly.