The outcomes of three races are still unclear, so it is still technically possible for Democrats to reach a filibuster-proof majority, but that looks unlikely.
Whatever the final number, Schumer says having a strong majority "is a big burden," because if you don't produce you can be thrown out as quickly as got in.
As for his own future, Schumer is almost certain to retain an influential position in leadership as a close adviser to Senate Majority Leader Harry Reid, though Schumer declined to confirm that because no official decision has been made.