Artem Russakovskii of Android Police has been wandering around and has found some convincing evidence to support these ideas. Internally, what had referred to com.android.launcher2 now points to com.android.launcher3. Now this explains a big change, as Android has been working with Launcher 2 since 2009. Moreover, there exist items that refer to the launcher as com.google.android.gel, and the rumor is that GEL stands for Google Experience Launcher. A new warning window in a recent build of Android 4.4 mimics warnings that you seen in various alternative launchers, when asking for permission to access widget data has been reported. That pop-up clearly mentions Google Experience as the name of the stock launcher.
Many believe that this may point to Google preventing the coupling of the launcher with Android as it has done with many other apps like the Google Keyboard, and put the Google Experience Launcher in the Google Play Store so that whoever wishes so can install Google’s launcher on their device. Most of the apps that are internally referred to with com.google.android.x rather than com.android.x have been apps that have made their way into the Play Store.
To know what could you expect from the new launcher, have a look at the leaked photos attached below that show some lock screen UI changes and app tray UI. There another important thing to notice in the leaked images; the leaked photos confirm that Android 4.4 update will replace the basic messaging app with Hangouts.