High resolution display is the equivalent of a 25 inch high definition screen from eight feet away.
One day of typical use. Some features, like video recording, are more battery intensive.
While there are thousands of Micro USB chargers out there, Glass is designed and tested with the included charger in mind. Use it and preserve long and prosperous Glass use.
The MyGlass companion app lets you set up Glassware, screencast and other features. It's available for Android and iOS.
Glass can be used as a Bluetooth headset with any Bluetooth compatible phone.