Just keep in mind that the SCOTUS will still hear the cases they planned to hear this year before Scalia's death. And when (not if) they deadlock 4-4, the ruling of the lower court will stand.
That's pretty significant, especially for the immigration executive order that they are going to hear.
It is really significant, for the time being, including for public sector unions (spared for now), etc. But....any of those issues the Court had agreed to hear and tied on can be brought back, and I'm sure the most contentious and significant issues will be.
It'll sure be interesting to watch this nomination process play out. It's already comical as all get out to have Trump morph into the voice of reason , saying Obama is entitled to his nominee, and to have the (fill in the blank) rigid "constitutionalists" such as Cruz say this elected President of the United States doesn't have the right to so.
Tied in knots, and the battle has yet to begin.