If you don't have a Moto 360, you can do what I did about six months back and make your own $7 version. Touchscreen doesn't work but battery life is phenomenal.
Update: "Rmukapps," the app's creator, reached out to let us know about a beta version of Secret Agent Watchface (if anyone's curious to try) that will turn the left bar into the tethered phone's battery indicator, among other features.
ICYMI: The Verge's Moto 360 Review
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