Yeah this is the same thing that happened with the iPad (it's a huge iPhone without the phone part? who would ever buy that?!) and more recently, with Windows 8

Yeah this is the same thing that happened with the iPad (it's a huge iPhone without the phone part? who would ever buy that?!) and more recently, with Windows 8 (metro is a failure! Microsoft is doomed!). Google Glass, in its current iteration, will likely never catch on with consumers. But it's a limited availability "preview" for a reason. Something like this is eventually going to get cheap enough and usable enough that consumers will buy it.