The Xperia Z also uses Battery STAMINA mode, which automatically shuts down battery-draining apps when the screen is off. This can extend the standby time by four times or more. The apps will automatically turn back on when the screen comes back on.
Of course, being a Sony phone, media plays a big part in the experience and the Xperia Z makes it easy to share all of your music, photos, and videos with other NFC-enabled Sony devices, which includes things like speakers, headphones, and even televisions.
The Android 4.1 phone will launch globally in Q1 of 2013.