I can answer a couple of your questions. First of all there is no real watch movement inside the Moto 360. The watch faces are digital (and adjustable) and the screen of the Moto 360 is oled. And it is suggested that it uses the Moto X's Active Display (activating individual pixels to save power, everything black are switched off pixels) to show the time at all times. Android Wear works with Android 4.3 and up (because of Bluetooth LE requirements). They work together with your smartphone and are not complete stand alone devices.
The lead designer of the Moto 360 didn't yet detail the exact charging method of the Moto 360, but it doesn't have any physical inputs (like usb) so wireless charging is most likely. He also stressed that power management was central to the design of the Moto 360 but no real details have been given at this moment in time, I guess we will get more information at Google I/O. Also interesting is that app developers don't need to make any modifications, if the app uses notifications in Android they also will automatically work with Google Wear, including actions if the notification is actionable in Android.
And yes the Moto 360 is indeed scheduled for Summer 2014 release. I must say that it is the first smartwatch that I am interested in buying if everything turns out like now depicted. I'm pretty sure though it will come at a premium price.
And I'm sure that Moto will be using a lot of what they have learned with the Moto X which has *excellent* battery life in spite of being always on.