I thought the authors raised a few interesting points for consideration as well as offering an informative overview of the state of AR.

First, I was interested in the everyday future of AR.  Beyond the specialized applications, what could AR look like to the average person in day to day life?  I like the idea that AR presents opportunities for playfulness and exploration, but find it much more likely that everyday AR will be a means for marketing and advertising.  I found this possibility fairly discouraging, though the authors seem more accepting of it.  We are already so immersed in advertising and it concerns me that this could provide yet another means for marketing to become more constant, subliminal, and pervasive.

The range of interactions that tactile AR might present also interests me, though it is perhaps more difficult than visual approaches to implement thoroughly at this point.

It’s also interesting to consider AR’s path to social acceptance–I expect that after some kinks it will be taken for granted, as social media generally is today.  Google glass will be an interesting step in “widespread” implementation.  The cultural conflicts that emerge from it may lead to new manners and social norms that facilitate its integration–though I expect Miss Manners will not approve as we stumble through the process.