The Out of Africa migration to Arabia is estimated to have happened "only" 70,000 years ago.
The study indicates that the Saharan Desert, despite having periods of greening, was truly a natural boundary preventing sub-Saharan Africans from moving north. The Genographic-backed history has North Africans being the descendants of ancient people who lived in Greater Arabia before moving back into Africa.
If true, this story makes one grateful for the periods of low sea levels which aided the populating of not only the Americas around ~15,000 years ago but also the escape from Africa.
This evidence also has a modern day impact. Hopefully it will be another nail in the coffin of pseudohistoric theories such as Afrocentrism in terms of Ancient Egyptians being Black, a theory embraced by some academics and even religions.