The real philosophical implications of chatgpt is not that a "program show intelligence" but "what do we call 'intelligence' and how do we recognize it?" And all chatGPT is showing is that humans are easily prone to BELIEVE to anything without thinking, because thinking is hard and humans are lazy. Religions of all kind explained since the beginning of Humanity what seemed to be "magic"...
As long as an AI program wont be able to really "create" something new - meaning different from any combination of what it has been fed - I dont think that you can call them "intelligent". It's only rearranging pieces of informations in different orders (with more or less accuracy for a human to give a sense to it). We're still using ELIZA program... just with more datas
But YMMV