An update for Unity from BZR added two new features to Unity, a keyboard shortcut hints overlay and a new launcher switcher. The keyboard shortcut hints overlay shows a list of Unity’s keyboard shortcuts with an overlay featuring the same design as the Unity dash. It looks very nice. It is invoked when the SUPER key is pressed and held. Check out the screenshot below:
Currently, the overlay only works with 3D Unity and it doesn’t not show with computers with small screens, i.e. netbooks. The overlay reminds me of the keyboard shortcuts wallpaper made by Octavian Damiean by at AskUbuntu.com.