Sony took to their Blog today to announce which devices will be upgraded to Jelly Bean and later then to KitKat. More importantly they also gave a time line for these updates.
From next month devices will start getting upgraded to Android 4.3 on a phased basis. As always, this is for unbranded devices so if you bought your device from a network, you’ll probably have to wait significantly longer.
Sony has been a little less clear with time lines for the KitKat upgrade but has indicated that the Xperia Z, Xperia ZL, Xperia Tablet Z, Xperia Z Ultra and Xperia Z1 will see it first.
We’ll update accordingly once we get more info on this but it is looking like it will be sometime early next year.