"Is this a new sign of the times?"
Nope, just another, highly predictable marketing gimmick. A very inexpensive ad campaign.
It's not whether or not such an ad appeared eventually, that's a duh, it's all about timing. Put it out too early or too late, and it would have little impact. The right time would be before the gadget becomes widely available, but enough people know about it. When the masses can actually buy the Glass in a store, it's too late, and the gimmick loses its impact, and might even start backfiring on establishments like those bars. The Glass itself is obviously pretty irrelevant here, they don't actually expect herds of nerds wearing Glass to pop in. It's all about viral marketing.
From the bar owner's perspective it's great, for a while, because it's all free advertising for him. The brewery apparently paid for the relatively inexpensive poster, and all the bar owner had to to is to take a photo of it and share it in social media, preferably addressing it to someone with a large audience, like +Robert Scoble
. Bingo, instant access to gazillions of eyeballs, totally free. With an option for viral visibility later, which will have an impact locally, too. Any traditional local ad campaign would have cost him clearly more. All the viral visibility will benefit the brewery, though, but only for a short while. It's really cheap and simple for them, as they don't even have to come up with a copy, because the audience will write it for them, as we can see above. ;-)
As for Google Glass and the "scared of the future" meme, please, Robert, that's lame, and it's getting very worn out. In places like Virginia, for example, people may indeed be scared of the future, but for obvious reasons, like the chance of Hillary Clinton becoming the next president. As for something like Google Glass, they don't give a crap.