In my opinion, the best thing for the human race right now would be to discover alien life. The moment we finally have solid evidence of a species from another world out there, people will finally begin to see how full of shit religion is.
There's nothing I'd like better than to see this disgusting world of religion turned upside down. All these phony, power-hungry, hypocritical individuals trying to force-feed us more of their bullshit explainations. Explainations, no doubt, created merely to discourage us from anything resembling questioning or logical conversation. No free thought allowed.
I would love to hear the christian church (not capitalized on purpose) try to explain why, as it turns out, we are not the superior of God's children after all.
The moment of first contact; the discovery of, or communication with other life in the universe, will mark the beginning of religion's downfall. And I can think of no greater possible "giant leap" for mankind.