It's some time past since we know that some Sony devices will possibly get an Android update. This are: Xperia T, Xperia V, Xperia TX and Xperia SP. Sony officials said that the new Android 4.3 jelly Bean could be updated on those devices late January or early February.
Today, Sony announced that he new update has rolled out. The new Jelly Bean and some other Sony-specific features will hit the devices. The Sony specs that will be changed are: Smart Connect, Messaging, Sony Select and Track ID. There are new Sony media apps and some Xperia Z series new themes also.
Many Sony users are waiting for battery usage updates. The new Android 4.3 will come with Power management hub, which will help the device to save more battery.
If you don't have the update yet, don't be impatient. This rollout is set in a couple of days, so surely it will come on your smartphone these days. Enjoy the new Android 4.3 !