Today morning, Sony Mobile through its twitter account confirmed the list of devices that will be getting Android 4.2 JellyBean. The list includes previous flagship smartphone Xperia Z, Xperia ZL, Xperia XR and Xperia Tab Z.
As per Sony Mobile. this update will be rolled out in phased probably based on region and carrier and brings display, camera, battery fixes & multiple performance tweaks. There is no word on exact time frame yet and though there is no full changelog s you can expect below features/enhancements.
Lock screen widgets
Extended quick settings
Android Daydream feature
My Xperia application
New customisable navigation bar with quick settings
Increased battery life and camera functionality
Source : Sony Mobile Tweet