Youth instead of immortality
While we are far from engineering immortality, we do, indeed, already have the technology to engineer youth, primarily through cosmetic surgery.
In practical terms, it means that if we, men and women, have a realistic chance to look 30, even when we are double that age, then we will have a completely different perspective in life.
If we cannot appear to be the same age as our 30-year-old competitors, we will favor a world in which the sexual market value of younger people is restricted, so that our own value will not diminish too far.
But if we have a realistic chance to maintain a sexually appealing appearance even beyond the fault line at which we would traditionally be viewed as goners, we can favor a world in which the value of older people does not have to be enhanced artificially.
Medical technology has indeed reached a stage at which it is a realistic perspective to maintain an appearance as if we were 30, even at well over double that age. The key really is cosmetic surgery. This is why cosmetic surgery has a philosophical, even metaphysical dimension.