It's an old idea, "the singularity". The machines become smart enough to improve themselves, and each improvement results in shorter (or more significant) improvement cycles. This leads to an exponential growth rate.

It's been promised to be around the corner for decades.

https://en.wikipedia.org/wiki/Technological_singularity

To be fair, Ray Kurzweil has been the loudest voice in this space, and he's been pretty consistent on 2045 since the publication of his book almost 20 years ago[1].

[1]: https://en.wikipedia.org/wiki/The_Singularity_Is_Near