Define "God" - Based on most people's definition of god, it's basically impossible to prove or disprove either way. Timeless, spaceless, omniscient, omnipotent (and somehow omnibenevolent, which is a non-sequitur).

But if there were some kind of undeniable proof that there is a god that set things into motion, then that is a deist god. It's an interesting thought, and it would revolutionize science (because then god becomes a proven, observable fact). But our lifestyle wouldn't change. I mean, god set things into motion, and then went away. Who cares? It's just a deist god.

Now, if, on the other hand, it were proven that the christian god of the bible is true... well, that would be very, very bad news for EVERYONE (christians and otherwise alike). I'm GLAD to live in a world where there's no reason to believe in that tyrant.