I've had great experiences with pair programming (and also bad experiences, but this is assuming a great experience), and I'd still want code review. The benefits can actually stack, if not compound, often enough.
I suspect something missing in pair programming that you get in a code review is someone stepping back and looking at the change as a whole, rather than the incremental bits as you go along. It can be helpful! I know at least when reviewing, there are things I miss when I only look at the update vs looking at the PR as a whole.
