Thank you @jerrytsuseer! I think it's one of those uses for blockchain technology that makes a lot of sense: reliability; a network built on user-generated content; accurate data storage; immutable (or at least accurate recording of all changes)... somebody just needs to build/code a front end that allows for the building of family trees... "posts" can easily be records of a person's life and include old photos that were scanned in.

Of course, it's more complicated than that... but at the same time, with genealogy, the "base layout" is ALWAYS the same.