Marsha Hippensteel: If you don't redirect, then users who bookmarked the page (with the original slug) will have broken bookmarks. Bottom line, if the page has been out there for a while, you might want to redirect (if you think users found the page worthy of bookmarking). But if the page is newly-authored and still in a draft state (never yet been published, or only recently published), then there might not be any point making a redirect.

Shannon Greywalker: Very helpful/perfect--thank you much! :)