How about a little serendipity? For example, in Google's concept video the man wearing the glasses meets a friend in a bookstore by following the most direct walking path to where his buddy had checked in.
Fine, but what if the man directed by the glasses missed out on a couple of interesting books he might have stumbled upon if he had taken a more circumventive and undirected route?
Not only that, some people, such as PCWorld's Ed Oswald have pointed out that there are some concerns with all that data being fed into your line of vision. Distracted driving as it relates to making phone calls and texting pales in comparison with what could happen when people use AR glasses in their everyday lives.
Even so, the technology is cool. But some people already bogged down with too much information will gladly wait to see Google's Glasses come to fruition.
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