Sony Mobile has included a new transparent feature in au by KDDI’s Xperia UL (SOL22). As seen in the video below, when moving around the home screen you will notice that both the on-screen keys as well as the nav bar at the top of the device have a transparent background as opposed to a black background on current Xperia devices.
This effect only occurs when you are in the home screen – as soon as you hit the settings, small widgets or any app the on-screen key background turns black. It’s a nice touch and we hope to see this UI hit Xperia handsets outside of Japan.
Via RBMen.