Late last year, Sony rolled out the Android 4.3 update for the Xperia Z, ZL and Tablet Z. The Xperia T and SP were also scheduled to receive the update last month but it got delayed for some reason.
Now, screenshots of the final Android 4.3 firmware for these devices have leaked out suggesting that Sony is nearly done with the update and is on the verge of pushing them out to the end users.