The new Google Experience Launcher in Android 4.4 KitKat comes with a bunch of improvements over the previous stock version. There is a new color scheme, new icons, new default apps and new functionalities like the ability to evoke Google Now with a simply swipe gesture on the homescreen. Wallpapers go full screen now, and if you sport something like the Nexus 5, you will be able to call Voice Search directly from the homescreen by just speaking out "OK, Google". If you are interested to take it for a spin, here's what you have to do install it, courtesy of XDA-Devs...
Source: http://www.phonearena.com/news/How-to-install-the-new-Google-launcher-and-apps-from-Android-4.4-KitKat-keyboard-Hangouts-camera-wallpapers_id48969
Source: http://www.phonearena.com/news/How-to-install-the-new-Google-launcher-and-apps-from-Android-4.4-KitKat-keyboard-Hangouts-camera-wallpapers_id48969