A number of Sony features are being added to the phone as well. The homescreen is revamped giving you up to 7 homescreen panels, resizeable apps and more. WALKMAN Album and Movies allow you to view your photos,videos and listen to your music all from one app. You can more easily add apps and widgets to your desktop by pressing on the icon and moving it to the desktop, or drop it on top of another icon to create a folder. And you should notice an improvement in the camera after the update.
Usually, these things don't reach all users in one day, so if your Sony Xperia TX has yet to receive Android 4.1, don't panic or jump or go off on a drinking bender. Trust us, the update will come.