Even if the Senate Republicans somehow find the minimal balls necessary to block Obama's far left-wing liberal replacement for Scalia, there are still three Justices left on the Court who will be over 80 years old next year. The next President will determine the direction of the Supreme Court for the next 30 years
The Constitution now says whatever the hell 5 out of 9 Supreme Court Justices want it to say. Either we will have a far left-wing oligarchy of Justices legislating from the bench for another generation or we will not. This election will decide.
Be afraid. Be very afraid.
A newly elected Senate is not bound by any rules of the prior Senate. They can make up whatever rules they want, including no filibusters, reducing the number necessary for a quorum, etc..
In other worlds, if the Democrats win the Senate this November, you can expect to see them hold incredibly expedited hearings on Obama's Supreme Court nominee, and fam through that confirmation before the new President is inaugurated. Totally legal/Constitutional.
Which means we could lose the Supreme Court before the new President even takes office, even if the current Senate GOP hold firm.