Will ChatGPT replace social media, Wikipedia, and news sites?
Its answers are often sufficient and it seems to know just what you are asking.
Robots have been around in some shape and form for decades. I doubt anythng can replace humans completely. Even if some things can be replaced by bots, they may have issues that would need human intervention anyway. Case in point. Stores with automated checkout counters. They still need humans to be around to help in case it goes bad. Some locations are even getting rid of those due to issues with theft etc.
having said this, we can clearly see that humans are being replaced by tools/bots/machines to some extent but not in entirety. For example, you may need 2 humans to manage a fleet of 50 machines that do the same work that required may be 200 humans to do manually earlier.
Where does ChatGPT get its input data from that it turns into responses / "knowledge"?
Humans create it in the first place. Without human creation, ChatGPT won't have anything to work with.
Why would it? I see no way that a chat-bot can replace a human audience, with a diverse set of real-world reputations, motivations and consequences.
ChatGPT sounds much like blockchain, NFTs, etc to me. Much ado about nothing.