Does the USSC arguments suggest a shift in abortion rulings?

Most legal analysts see it likely that USSC upholds Mississippi Abortion law

The Washington Post suggests:

The Supreme Court on Wednesday signaled that it is on the verge of a major shift in its abortion jurisprudence and is likely to uphold a Mississippi law that mostly prohibits the procedure after 15 weeks of pregnancy.

Whether that would mean overruling Roe v. Wade’s finding that women have a fundamental right to end their pregnancies was unclear. But none of the six conservatives who make up the court’s majority expressed support for maintaining the court’s rule that states may not prohibit abortion before the point of fetal viability, which is generally estimated to be between 22 and 24 weeks.

Chief Justice John G. Roberts Jr., often the most moderate of the conservatives, said Mississippi’s limit of 15 weeks was not a “dramatic departure” from viability and gave women enough time to make the choice to end their pregnancies.

Now keep in mind that this is not the Texas so called "heartbeat law" that basically outlaws abortions after just a few weeks and possibly even before some women would even know they are pregnant. I believe that it's more than possible to see a legal difference between a law that says abortions are illegal after 15 weeks (when 22 is the current standard) and one that makes it illegal after 6 weeks.  

But many will argue that moving the benchmark from the fairly established 22 weeks is a significant step for the courts to take, even if 15 weeks still seems reasonable in comparison to 6 weeks. That this sort of shift opens up the slippery slope where another state will jump in with 12 weeks, and then some other state will push something at 10 weeks, and so on and so forth. 

At one time the courts generally found any law that restricted abortions prior to the third trimester (26 weeks) other than for health concerns to be unconstitutional.  Right now the survival rate at 22 weeks is generally less than 10% while just two weeks later (at 24 weeks) the survival rate is around 60%. As far as I know, no premature baby has survived when born prior to 20 weeks and certainly not at 15 weeks. 

So at the very least, if the Mississippi law is upheld, the idea of a constitutional requirement of abortions only being allowed to be restricted after viability is a goner. That would be a significant ruling for better or worse depending on your view.