Your blind coworker will love the sudden destruction of accessibility. Without the 3d code review, he might have been a constructive team member. With the new tech, you can send him home and let him think about the fact that he is now useless.
But I also know that no blind developer would want their sighted fellow developers to miss out on something useful on their behalf, especially not in some kind of preemptive gesture of sympathy.
The option to do code reviews in a 3D environment does not automatically mean that older technologies can't be used for the same task. And it does not imply that blind people will get fired if 3D code reviews become popular.