People working remote in other locations will have higher salaries from SV companies since they are used to paying those salaries.
People moving from SV to other locations should expect moderate drops (10-20%). In my own experience moving to a 0% state income tax state, it effectively canceled out the savings from CA tax but the cheaper housing more than made up for it.
Longer term:
Tech salaries will come down as employers hire from a larger talent pool that is cheaper on average. This will make it hard for people in SV to work remote as they won't be as competitive. This probably means SV will become more affordable.
> be compensated the same as those in SV?
Generally speaking no, compensation has an aspect of location. Companies are going to have a harder time paying SV rates if they know you are in a cheaper area.