Dr Steve Mann has been developing wearable computing systems in the same manner as Project Glass is, but he's been doing it longer. Since 1999. The sad part is, he got beaten up in McDonald's for wearing his dorky glasses.
Mann's device, called the EyeTap Digital Eye Glass, is more an academic study than a commercial venture. But it looks very similar to Project Glass. And if this isn't proof that wearing a computer on your face won't get you the approval of the public, then we don't know what is. Mann reports the incident on his blog:
[M]y family and I seated ourselves in the restaurant right by the entrance, so we could watch people walking along Avenue Champs Elysees while we ate our meal... Subsequently another person within McDonalds physically assaulted me, while I was in McDonand's, eating my McDonand's Ranch Wrap that I had just purchased at this McDonald's. He angrily grabbed my eyeglass, and tried to pull it off my head. The eyeglass is permanently attached and does not come off my skull without special tools.
The assault resulted in Mann being pushed to the floor, and damaging his glasses. Read the whole account at his blog. [Eyetap via Verge]