Android L, the next iteration of Android would bring several new features and new material design, a new visual language. Google released developer preview of Android L for Nexus 5 and the Nexus 7 (2013) yesterday. XDA members immediately ported the keyboard to other devices and released Flashable Zip for rooted users and APK for all other non rooted ones. Today some folks from the XDA released the Android L Keyboard on Google Play.
You can install this keyboard just like other Android keyboard apps and set it as default. This doesn’t require you to remove old keyboard.The default theme is black, but you can change to new Material theme from the advanced settings. The publisher promises to make Material design theme as default in the next version.
The Android L Keyboard includes all the features of the stock Google keyboard. You can long press the Return key to bring Emojis.
Download Android L Keyboard from Google Play / APK (Android 4.0 and later)