low tech alternative: Glass appeals to me because it takes up less room. e.g. in a tent, you don't always have room to hold a device out far enough for your eye

low tech alternative: Glass appeals to me because it takes up less room. e.g. in a tent, you don't always have room to hold a device out far enough for your eyes to focus on it. Eventually I realized that reading glasses ($5, available everywhere) also change your focal distance - and as a bonus, increases your display size, without increasing device size, nor battery usage (which larger displays do). But I think google's strategy is right: get a foothold before the technology is ready. Then, when devices are smaller, it will all be there. Their big deficiency is that they haven't found any real users yet... My advice is simple, and something that engineers find impossible to do: remove the cool feature of a camera. Bang, privacy concerns gone, but still a revolutionarily useful product in other ways. And before long, people will accept they never really had privacy, so you can put it back. Note: I expect this is what Apple will do.