The true power of AI is that it will have expert levels of knowledge in multiple areas if not all areas of human knowledge.

Even now a human genius will still have big gaps in knowledge in field in which they do not specialize. AI will have no gaps and potentially know all that is known at a given time allowing it to discover new knowledge and share it with humans and other AIs instantaneously. Thus, will be created a feedback loop of ever-increasing knowledge leading to singularity.