The only movement/agenda being set for the future in this race is by Sanders, who has the support and admiration of an enormous majority of the Millennial generation.
Most of whom will become steadily more conservative as they get older. Younger generations are supposed to have outlandish world views that are suppressed by older generations. The young overthrowing the old leads to social reform/moral decline, but once they see that the generation after them is even more radical, they cling to their ideology and become the new conservatives. I have faith that most young Sanders (and Clinton) supporters will eventually realize the errors of their ways and I just hope that it happens before they've destroyed their country.
What errors of our ways? Even if conservatives want to give me a bigger tax cut, there are still many reasons to vote Dem. I'm not a single issue voter and as a taxpayer, you can't just dangle a taxcut in my face while you have insane social policies and even some crazy fiscal and foreign ones, too.