Pretty much. Look at the anti-war movement of the Vietnam era. Most of those people went on to boring lives of having children and saving for orthodontics and college. All that's left is a handful of psychedelic relics in a tent across the street from the White House.
But more than a few of them went on to become leaders of the Democratic Party (John Kerry, for example), or movers and shakers in academia (Bill Ayers), media (the list is endless) and a host of other areas of influence, where their radical politics continued to inform their worldview. These are the guys who are now carrying water for OWS.