According to Wikipedia:
Filibuster is a tactic used in the United States Senate to prevent a measure from being brought to a vote by means of obstruction. The most common form occurs when one or more senators attempt to delay or block a vote on a bill by extending debate on the measure. The Senate rules permit a senator, or a series of senators, to speak for as long as they wish, and on any topic they choose, unless "three-fifths of the Senators duly chosen and sworn" (currently 60 out of 100) vote to bring the debate to a close by invoking cloture under Senate Rule XXII.
Assuming that 60 out of 100 senators will never agree on the same thing, won't new legislation proposed by the Democrats be blocked in the senate by Republicans? If so, what is the point of gaining control of the senate?