It seems Sony is updating certain Xperia devices, like the Xperia Z, mainly centred around three main apps that include cloud storage integration.
The updates mainly related to the Album, Video and Walkman apps on the devices. The changes to the apps include refined cloud integration, which should allow users to access their media content more easily whether they are stored locally or in the cloud.
The rollout is being performed gradually and as long as you own an Xperia-branded Sony smartphone with Android 4.2, the over-the-air (OTA) download notification should hit you soon according to reports from Android Authority’s website.
You can view the Sony Mobile blog to see what changes are being made to the apps and what in indeed included within the update. You can also watch the video which is included on the blog about the update and features included: