I doubt any proof aside from a full-blown confession by the government, or each person having their own alien encounter will sway the masses at this stage. Even the video Alien Autopsy was debated and then swept away as a hoax by the majority.

Still, I think the idea of other more intelligent life forms existing, and here with us, is entering our culture and consciousness the way it was intended to. It is seeping slowly and gaining more acceptance all the time.