So, we got a full system dump from ivan123 that contains:
- All Android L apps
- Ringtones & alarms
- Google Play Services
- Boot animation
Unfortunately, not all apps are working fine and you may experience crashes or other problems.
However, you can give it a try!
The apps are not flashable, so to install them, you have to push the apk to /system/app, clear dalvik cache & apps cache, change permissions (rw-r-r--) and reboot.
Fortunately, you don't need to be rooted to get the wallpaper...and Google Keyboard!
To install Google Keyboard, download the APK, uninstall the previous version, install this one and change the theme to material in advanced settings of the app.
For more, visit XDA Thread.
To get the new Android L soft keys, install SoftKeyZ app, enter the softkeys gallery and install the Android L SoftKey design!