All specific anxieties about baldness aside, it would be cool if human beings were able to so radically re-engineer their appearance in such a striking way with a single chemical target / treatment that we could go from a species where the males get a chrome dome in their mid-life, as it has been for hundreds of thousands of years (presumably), to a species where males (and females) have thick locks long into their twilight years.
All those funny portraits of history with balding VIPs would become anachronisms, divided from the hirsute future by a follicle singularity.