Great, now in order for this feature to show up in precise it needs some more work and refinement. Our focus on quality continues and this feature is not excluded -- in order to ensure its of release quality for precise, we're asking the community to help test and evaluate the feature. Here's everything you need to know to get started:
Prerequisites: Make sure you are running the latest version of precise, and all your packages are up to date. Unfortunately this cannot be installed on oneiric or any previous ubuntu release.
1) Add the HUD ppa (https://launchpad.net/~unity-team/+archive/hud). You can do this by issuing the following command:
sudo add-apt-repository ppa:unity-team/hud2) Update apt and run a dist upgrade -- this should prompt you to upgrade unity and some indicators
sudo apt-get update && sudo apt-get dist-upgrade3) Restart your unity session by logging out and logging back in again.
Now you should be up and running. Invoke the HUD using the 'alt' key. Go and try out your favorite apps and see how things work. When you find a bug, at this point please do not use the ubuntu-bug command or apport -- these tools are not setup to handle working within a ppa. Instead file a bug using launchpad against one of the following projects depending on the nature of the bug:
For anything related to the user interface, ie directly unity related, file a bug against unity: http://bugs.launchpad.net/unity When filing, tagging the bug with 'HUD' would be helpful to streamline visibility to the unity developers.
For any issues with matching or other issues core to the tool itself, file them against the appmenu indicator. http://bugs.launchpad.net/indicator-appmenu
Still stuck or have more questions? Visit the wonderful folks on #ubuntu-unity on Freenode. And remember, HUD will also land with unity 5.2 coming soon!