Xperia Z2 aka Sirius will be one of the best phones announced this year. Along with awesome specs it will feature a new UI.
New graphic elements, tweaks and more are coming, such as new themes and settings, as well as new colors and even fancier wallpapers.
Transparent status bar is there as well, showing everyone the phone is running KitKat rather than some older version of Android.
In addition, let’s not forget customizable quick settings at the top, custom white balance settings for the screen, Smart Backlight Control, Smart Call handling, and updated camera software with few new features like TimeShift that enables high-speed recording for slow-motion effects.