I saw a great comment by Henrik Nordberg on Google+, in the Glass Explorers group. Here's his comment:
I certainly don't think it will be easy. I've seen social disapproval of Google Now because it scans certain parts of your Google services for usable data (mainly your Gmail). I'm trying to get my hands on Glass as soon as possible, but I think it'll be a while before the public is accepting of such devices.
Face it: Glass is a step in the direction of augmentation of the human body. I will use it to augment my memory, vision, and other senses (let's add an IR camera so we can see in the IR spectrum!). Eventually these things will become so miniaturized that you will not know someone is wearing them. With this in mind it is clear that we need to have a discussion of what is socially acceptable. The technology will exist. There's no point in hiding it or from it.
I certainly don't think it will be easy. I've seen social disapproval of Google Now because it scans certain parts of your Google services for usable data (mainly your Gmail). I'm trying to get my hands on Glass as soon as possible, but I think it'll be a while before the public is accepting of such devices.