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That Tweet likely articulates Google’s biggest fear for Glass, its wearable computer. What if the cool crowd doesn’t accept it? What if, like the Segway, it becomes an emblem of the awkwardly nerdy? What if consumers reject the technology because, even though it’s amazing, there’s too much social stigma to being seen in public with it?

This fear, presumably, is why Google’s working so hard to turn Glass into a...