What I find impressive is how confident Steve Jobs was in 1981 that soon everyone would have a computer -- just like in 2007, he was confident that everyone would soon have a smartphone. I wasn't around in 1981, but I know that in 2007 that wasn't a popular opinion. People talked about the "smartphone market" as if it would stay a fraction of the general phone market. In retrospect, it's pretty obvious that computers…
Augmented reality will be a part of everyday life.
The internet was around for a decade or more before the web. The web was the breakthrough required for mass adoption -- rich media over the network. Also ubiquitous PCs were necessary.
I argue that the internet didn't become part of every day life until 2004 or so. I've been on the web since 93, and am a programmer, but in 2002 I went a whole summer without internet access because I was subletting a room without it.
Before 2004 or so, the web was really for looking up stuff. After Facebook and MySpace, "life" started happening on the internet. The nightly news would report things that happened on Twitter.
So I'd say that augmented reality hasn't had its www moment yet, and after that it may take a decade or more to become part of every day life. Really adoption is a social issue, so what needs to happen is that the old generation dies.
That said, Snapchat might later be viewed as the precursor to AR, and it has wide usage. It might be that generation or the next.