Until a republican congress outlaws it nationwide along with gay marriage.If this is the majority opinion (I am skeptical, largely for reasons related to my understanding of Gorsuch's approach to the 14th Amendment), then abortion laws would vary by state. In some states, abortion would be made entirely illegal. In some, it would be made illegal after a certain point (15 weeks, 6 weeks, etc.). And in some (Democratic-run) states, it would still be legal at any point.
Roe v. Wade enshrined a *federal* right to an abortion, which this opinion would revoke.