I had for a very short time a FB account, which I deleted. I deleted my Twitter account about two years ago. I was hooked by Google+ and I had a popular collection about artificial life (now is public again). But I deleted my g+account before they closed it.
All my family has smartphones, but I can't stand the limitations. When the smartphones will be liberated I'll have one.
My overall impression is that, some details excepted, now that everybody has a computer in the pocket, people pass through the same learning process as we nerds did some years ago. Today is harder, because less freedom. On the other side, the new thing is that today everybody is online.