We're already seeing the problems. The Alt-right was breeding in forums where single frustrated men were going to vent. Why they are single and frustrated is something to be studied, but if you read some of their posts, it's really clear that they have expectations for relationships that come straight out of porn: submissiveness and insatiability.
Those threads and /r/TheRedPill are disturbing. They feel insulted that women are choosing other partners over them, as if a stable income is all that is necessary to be entitled to the girl of your choice.
When their socially inept advances are rebuffed, blame is cast on the media and on a feminist cabal agenda to emasculate men. Instead of trying to connect on a human level or looking in the mirror at what might need improving, society becomes the problem.
Men have been sexually frustrated for centuries. The only thing that's new is that the internet exists so all the sexually frustrated men can sit around and complain together.
I predict that its rise will be found to be caused by tremendous social problems that we are refusing to acknowledge. IMHO, it's a symptom, not a disease.