There have been novelizations many years ago of horizon wide image projectors by camouflaged aircraft combined with a broadcast systems so far beyond the even more powerful rock concerts to display images of deities or of religious nature in a foreign country.
Evey continent and culture has its historical deities of worship, whip up a program of Vishnu at night in India and you would get millions in a terrified obedient euphoria.
Imagine to voice of Allah heard for hundreds of miles with atmospheric images in the middle east.
If any country can leap ahead in technology its the somewhat isolationist Japan.
If they had succeeded with this, it would likely have been the last love song on this little planet.