Sure, but already FB is tainted with an "only old people use that" meme for several years now. Once the boomers start really dying off, I think this is when FB will fade.

Plus, I think society as a whole is beginning to see the toxic ills of social media in general and will push back in a "retro" "back to the basics" kind of movement, embracing old traditions like community, family and friends in meatspace.