It will be another tool people use. Pro: can surreptitiously take photos without causing people getting annoyed. However, it's a piece of hardware you have to deal with. For example, 3D glasses were supposed to revolutionize television. Instead, they were cumbersome and the idea never took off. Con: the surveillance state will now have live sound and video streaming from everyone. I've already turned off all my app notifications because they are incredibly annoying. The last thing I want is my field of vision having advertisements popping up as I pass by stores and restaurants or even information. Imagine the information overload. This is dystopian. I already can imagine Black Mirror making an episode about this. This is just incremental advancement toward trans humanism. I'll pass.