And we know that while warp drive might be possible, it's not feasible and we probably won't be seeing it in our lifetimes.
The technology advances are often far more gradual than we would expect (and hope), but no less transformative. Just think (if you're old enough) how life was before the Internet became ubiquitous. Has life radically changed since then? I wouldn't say it has, but many, many parts of our lives have changed radically, things we see and do every day, and mostly for the better.
I think AI is going to be the same. It's not going to manifest in the ways we commonly expect (e.g., computers you can converse with, etc.), but will come about gradually, with software getting smarter and smarter until things we commonly see, say 10-20 years from now, would have to fall under the definition of "A.I." even though it happened gradually enough that it didn't occur to us... because we don't yet have HAL 9000.