No computer will ever demonstrate actual intelligence, which is the ability to bring a new and unforeseen solution to an existing problem. I need only a cite a few examples to show this is true: Uber cars run over people. Facial recognition claims black people are criminals just for being black. Facebook's AI software lets in fake news.
These are all errors that could be avoided by actual human intelligence. The fact of the matter is that we don't really know where intelligence or creativity comes from. It's unlikely that we ever will. (See "Heisenberg Uncertainty Principle" for one reason.) While machines are great at doing things faster than people can do them, they're not good at inventing new solutions or doing something that humans couldn't do, given enough time.