[corty]

Even if intercontinental interbreeding is still rare, societies and therefore breeding patterns have become far more connected on a local, national and intracontinental scale. Where there used to be the proverbial inbred populations in remote mountain valleys, mobility has completely erased the formation of such pockets. Same for marriages to other nationalities and religions. Where my german catholic grandmother might have gotten into trouble for marrying a protestant or a frenchman, nowadays that isn't a problem anymore.

Geographic variation will not dissappear completely, but the granularity and amplitude of those variations was and will continue to be smoothed a lot.