Encountering an alien AI would not only point to our own possible future, but also prompt a curious shift in our worldview. When Nicolaus Copernicus proposed in the 1500s that the Earth was not central in any way to the Universe, he set in motion the development of a critical scientific idea: that there is nothing cosmically special or significant about us. But meeting an ET-AI could turn that realisation on its head: if the only intelligence we meet is machine in nature, then we would be special, after all.