Are the Aliens Coming?

NASA has scheduled a press conference for Thursday to announce a major Astrobiology discovery. Could this be the announcement of Extraterrestrial life?

NASA and SETI and countless other groups have been searching for evidence of extraterrestrial life for as long as humanity has been looking at the stars. On Thursday, December 2, several NASA astrobiologists will announce results “that will impact the search for evidence of extraterrestrial life”.

via PCWorld.

If this is the announcement that many are speculating about, what does it mean for us as a species? What happens when we truly find out that we're not alone in the universe anymore?