The idea that humans will be able to create machines capable of independent thought is a myth.
I won't happen because it can't happen.
Machines don't think.
It doesn't matter how fast computers can process computations, they only follow commands, and don't "understand" what they're doing.
For something to think, and be intelligent it needs to be alive.
Computers and machines cannot be alive. Not unless people combine computers with something that is already alive. Like implanting chips inside a persons brain.
This is not AI though, it's an artificially augmented human being.
The modern concept of AI is splintered into two main groups of ideas.
Weak AI and Strong AI.
The Weak AI position is that machines can be programmed to *seem* human, but that they won't have a mind or consciousness. Weak AI is then theoretically possible, and it's already happening in some areas, but Weak AI isn't what most people think of when they think of "AI".
The Strong AI position is that machines can become intelligent enough to surpass human intelligence. neither of these things will ever happen.