The video of that alleged Nexus 5 found in a bar seemed to confirm the speculation that in Kit Kat, Google is eliminating the blue Holo theme, to be replaced with a white/gray color scheme; now, a picture from the Korean keyboard IME app offered by Google and sitting in the Google Play Store, reveals more information about Android 4.4 (Note: Google has since removed the picture)...
Source: http://www.phonearena.com/news/Screenshot-of-Google-Korean-keyboard-app-shows-Android-4.4_id47627
Source: http://www.phonearena.com/news/Screenshot-of-Google-Korean-keyboard-app-shows-Android-4.4_id47627