With Android 4.4 KitKat, Google implemented a small but visible tweak that many Android users have long been clamoring for – both the status and navigation bar were made translucent, allowing the homescreen wallpaper to cover the entire screen instead of being cut off at the top and bottom. However, this is one feature – if that’s what we can call it – that might not make it to the Nexus 10, according to text found in the source code for the device.
Rather, the translucent status and navigation bars will arrive on the Nexus 10 with the initial Android 4.4 update, but will be disabled in the follow-up update to Android 4.4.1 (though developers building ROMs using the source will be able to enable it if they wish). “Translucent status & navigation bars perform poorly on this device,” reads a note in the 4.4.1 source code for the device, but without any explanation to why this is the case.
XDA Developers member JosephRaphael believes it could be because of the Nexus 10’s high screen resolution (2560×160), though that would be rather odd considering the powerful quad-core Mali-T604 graphics chip powering the tablet. Google will probably explain the issue in more detail, but for now, it looks like Nexus 10 won’t be getting translucent bars like other Nexus devices.
Source: XDA Developers