With iOS 7, many people said Apple's mobile operating system became a bit more like Android with live wallpaper, control center and the like. It's a bit fitting then that the latest purported images of Android 4.4 KitKat seem to suggest a flattened, 2D design that looks strikingly similar to iOS 7.
The changes are most obvious across the stock Android floating dock icons as these have lost most of their detail and shadowing in exchange for a flat 2D look. Elsewhere, the phone application has also been reworked which in this case is heavy on blue with a white backdrop while the messaging app seems to carry over the heavy white theme (apparently white is in this season with regard to UI design).
Collectively, it appears that the status bar changes color depending on the color scheme of the app that is open. It's unclear whether this is controlled by the app developer or the overall theme used in KitKat.
Android 4.4 KitKat, the new codename for the update which replaces Key Lime Pie, is expected to drop sometime next month alongside the rumored (and leaked) Nexus 5. As per a recent FCC filing, that handset is expected to carry a 5-inch display, a Snapdragon 800 processor, 7-band LTE, 802.11 ac Wi-Fi and of course Android 4.4 KitKat.
Most also expect to see updated Nexus 10 hardware either from Asus or Samsung around the same time that could also debut with Android 4.4 KitKat.