Google Glass is cool, but I really dislike all these phone camera AR applications. They just don't seem at all innovative to me and it seems that when people mention AR, thats what most people think of. People seem to forget that AR really applies to anything where reality is augmented and there are much cooler applications than overlaying data on a location and orientation aware video feed on a phone using the phones camera. This comment isn't really about the article, but more about people talking about AR in general, since the article does talk about much more interesting forms of AR!
At the risk of tooting my own horn too much, here's an augmented reality framework I built as my final year undergraduate project: http://dublindan.posterous.com/things-ive-worked-on-1 Basically, its an augmented reality system that uses only audio as feedback. One example application could be to guide blind people through obstacles.
Personally, I'd love to build something like that combined with Google Glass...