In the end, as the scientists catch up to each one, they realize the entities have discovered a very human means of interacting: the power of physical contact; and not physical contact between humans and technology, but physical contact between robotic entities. And with this discovery, the entities join forces to only grow stronger. This development ushers in a new paradigm where the difference between AI-entities and human entities becomes less and less discernible.
All the AI and robotic science featured in the book is real; the story line is fictional, but with how fast innovation moves, it's not hard to envision.