The Electronic Entertainment Expo, commonly known as E3, is an annual trade show for the computer and video games industry presented by the Entertainment Software Association (ESA). It is used by many video game developers to show off their upcoming games and game-related hardware.
E3 is widely regarded as the world's largest regular convention for video games. Video game companies generally spend more on their presentations for E3 than any other convention (including fancy decorations and pyrotechnics).
And teh biggest shock at E3 2009 -> Official Announcement of Final Fantasy XIV Online (PS3/PC)
Teh Official Logo of FFXIV