“I hope this is good,” said Munir Shafie, 36, an electrical engineer who was there. “But how are we going to benefit?”

Still, the General Assembly vote — 138 countries in favor, 9 opposed and 41 abstaining — showed impressive backing for the Palestinians at a difficult time. It was taken on the 65th anniversary of the vote to divide the former British mandate of Palestine into two states, one Jewish and one Arab, a vote Israel considers the international seal of approval for its birth.

The past two years of Arab uprisings have marginalized the Palestinian cause to some extent as nations that focused their political aspirations on the Palestinian struggle have turned inward. The vote on Thursday, coming so soon after the Gaza fighting, put the Palestinians again — if briefly, perhaps — at the center of international discussion.

“The question is, where do we go from here and what does it mean?” Salam Fayyad, the Palestinian prime minister, who was in New York for the vote, said in an interview. “The sooner the tough rhetoric of this can subside and the more this is viewed as a logical consequence of many years of failure to move the process forward, the better.” He said nothing would change without deep American involvement.