Even if the current incarnations of SOPA and PIPA laws are stopped, this will just be one of the many battles in a long war. The industries and lobbyists will keep on pushing. It is up to us to ensure future incarnations of SOPA and PIPA are not overreaching thus doing more harm than good.
As one of the lead Fair Copyright for Canada Calgary organizers who has written articles, sent in personal submissions for parliamentary copyright committees, and organized protests since December 2007, I try to do my part to help shape Fair Copyright laws in Canada. Given that experience, I know the anti-SOPA and anti-PIPA has to be the beginning and we should be prepared to keep up the effort for sometime to come.
Jan 21, 2012 Update: Mashable, “The Week That Killed SOPA: A Timeline“