It will never happen. Namely because its not possible, but also because the things you'd need to be capable of in order to "perfect" sex reassignment would lead you so far into posthumanism that men and women as you know them would be more of an anthropological interest than a thing of that time's present.
Besides that, trasngender people are mentally ill and would just find something else to be neurotic about because their very mental illness is to desire the impossible. We will sooner have a cure for transgender compulsion/mental illness than be able to realize their delusion with new bodies.
Besides that, trasngender people are mentally ill and would just find something else to be neurotic about because their very mental illness is to desire the impossible. We will sooner have a cure for transgender compulsion/mental illness than be able to realize their delusion with new bodies.