Etiquette. Remember, once upon a time, when it was considered rude to use your cell phone in public? Or when it was rude to even have it on in a place like a theater or a library? And then, almost overnight, they decided to make it as difficult as they possibly could to let people even exist without being glued to their telephone? This will go the same way. We'll shun these spyglass people as we once did the Bluetooth headphone assholes, and in a year or two the declining rate of profit will mean the spyglasses will be mandatory. They'll have to start colonizing more and more aspects of our lives, so we're not allowed to order food without our glasses automatically uploading a photograph to Instagram or some bullshit.