Grey Matter
We are seeing more and more sons of Reform parents going to Day School. However a large part of the R community are so secular, to include intermarriage, that they will be assimilated.
As for Sephardim being east, yes and no. We have Sephardim who are in the UK, Spain, and the West. What is happening in Israel is not Sephardim but Mizrahi who are eastern. And they remaking Israel into a more middle eastern country. As that progresses much of Judaism will shift to being more Middle Eastern.
What is left of R/C/MO who have not either become Haredi or assimilated is that they will migrate towards Sephardi communities that are not as rigid as the Haredi world.