It is a good sign, yes.
However, let's be realistic: if they vote Republican they will be disappointed.
The Republican Party says it's pro-life, that its goal is to overturn Roe v. Wade, but they have done nothing on this front. In fact they have done worse: they added a "no exceptions" [for rape/incest] to the party's official planks... and then nominated someone who says "of course I support exceptions."
Before you cite the partial-birth abortion ban [PBA] as Republicans living up to their planks, let me ask: what have they done in the interim? History shows that this was not the beginning of an incremental movement, but rather a singular event. (Also, while nearly all Republicans voted for it, so did a third of the Democrats; this is, of course, assuming the Ban was a good thing, there are some that think it useless which, considering some of the insidious properties of our 'justice' system, may be more correct.)
The sad thing about the Republican Party is that this is typical of their planks; IOW, the Republican Party is really just talk.
Of course you have to know that the plank is the high ideal and we take the best we have and try to reach it. With more prolife thinking youth I see hope for the future after this election. We can't just jump of the nearest bridge because of failures in the Party.