My fantasy is that at some point we’ll have a sufficiently powerful telescope to cause a galactic “Van Leeuwenhoek moment” where, just like that discoverer of microbes, we will suddenly see the galaxy swarming with spacecraft.
No? I genuinely think most of the world will have moved on and will be caring about something else within a day, the world will be about as chaotic and tumultuous as it was shortly after the discovery of microbes.