A few points of interest from the Moto360 event going on now on YouTube. [Update: Event is over.]

Wireless charging - I'm inferring this, they didn't explicitly say it, but implied it strongly.
1.8" (46mm) diameter.
Won't comment on battery life, "but was designed with power efficiency in mind."
Targeting mass appeal, so not intended as a men's watch.
Works with all Android devices running Android 4.3 or later.
Water resistant, details forthcoming.
No camera embedded in the watch (thankfully).
Genuine leather.
"With this watch, you'll always be able to tell what time it is." (Subtle jab at Pebble?)

More updates posted as they're revealed.