I want to emphasis that because men have significantly more outliers when it comes to achievement and social outcomes (both positive and negative ) , we should expect such a change in culture to ceteris paribus result in a net decrease in very exceptional achievements. Young men are also responsible for the vast majority of violent crime. We should expect delayed marriage and drop in marriage to push in the direction of more violence as well.
"Being a physicist is a drag, but it still beats working" (Aurelio Grillo as quoted by Giorgio Parisi, translation from Italian mine)
Dalrock writes an interesting article related to Dr. Helen Smith's book the Marriage Strike. I really have to bump it up on my too rapidly growing reading list. (^_^)