A dimension not much discussed here is that code review is not only about quality but accountability and security. An automated review is going to help to ensure the code behaves as intended, but it is not going to ensure the intent was correct. Employees inserting back doors, bypassing tests, "cheating" on design decisions to get the work done faster etc are not going to be identified if the person driving the change tells the AI it is the intended outcome.

For this reason alone, I don't expect code review to go away entirely in most contexts where the code "matters" - in the sense that there is substantial liability to it being mis-specified at the implementation level, not just technically wrong in implementation. I do expect it to evolve a lot and become dramatically AI-assisted.

The main protection ultimately is a human being willing to put their reputation on the line by saying "I understand this change and I approve it". That, inherently, means review of some kind.