I have been casually following a few general advice kind of subreddits for a long time (/r/relationships, /r/relationship_advice, /r/parenting, /r/TwoXChromosomes, etc), and there's definitely been a noticeable uptick in posts seeking advice regarding a situation where a father found out that his children were not biologically his, or children found out that their biological parents/grandparents are not who they though they were, and other similar kinds of scenarios, because of cheap, easily available genetic testing kids.

It's a fascinating and entirely predictable turn of events, and it's not going away any time soon given how useful and profitable genetic testing is.

I suspect that a few decades from now, the notion of a time where no one could know for sure if their "genetic" family was really who they thought they were (unless you're a Baratheon) will seem quaint and romantic.