Why do old people like moving their mouths?

Random thought:

We kids are considered 'modern', right? So when we grow old, would things have changed so much that we become 'old-fashioned'? Would we be like our parents/grandparents who lived totally different lives back then? What would our kids think of us? AND, would we still have the internet as it is? Of course there'll be changes and improvements and whatnots, but I get this feeling we've entered a new era, where we will still visit forums, BLOG, and play video games even when we hit 60. Imagine your sons and daughters or even your grandkids visiting your blog, reading about you reminiscing about old times. No more language barriers, technologically unsavvy people. Unless of course something new and radical is invented that we can't fathom using. Imagine people using fashionable bionic hands that can be plugged in to our bodies to help us multitask in the future. I think I'd stick to my good ol' hands and remain 'old-fashioned'.