Religion, life's meaning, our place in the universe -- everyone will face an immediate reckoning here and have to reconcile their previous notions.
But even more impactful is that we'll start to be able to make much better approximations of Fermi's Paradox. It might suggest that the universe is teeming with life. Then questions about how it evolves and reaches sentience will move to the forefront. We'll have much better ideas.
We might start to get a little anxious about what's lurking out there, and we will probably start spending massively on space telescopes.
Society will start looking up.