I'm sure most kids view the concept of a "forum" or "blog" as a quaint anachronism, something like a typewriter or a telegraph. As (if?) they mature, whether they come to see forums and blogs as useful, or stick with FB/TW and their descendants, remains to be seen.
Is there a clear distinction between a forum and a blog? With most blogs apparently accepting submissions from others, rather than being written by one person, what's the difference? Has "blog" expanded to include the concept of "Forum" (now there's an ancient term, referring to something from the Roman Empire!).