From the HUD dept.:
Ubuntu is set to replace the 30-year-old computer menu system with a ???Head-Up Display??? that allows users to simply type or speak menu commands.

Instead of hunting through drop-down menus to find application commands, Ubuntu???s Head-Up Display lets users type what they want to do into a search box. The system suggests possible commands as the user begins typing ??? entering ???Rad??? would bring up the Radial blur command in the GIMP art package, for example. HUD also uses fuzzy matching and learns from past searches to ensure the correct commands are offered to users.