It’s like carrying one 12-pack of beer rather than two.
https://www.youtube.com/watch?v=N9SIS4izLqE
and:
http://www.motorcyclenews.com/news/2009/march/mar2709-histor...
Design requires fitting form to function, and that often means you add non-functional, ie "useless", parts to ensure the interface between human and device is ideal. Aesthetic appeal is a huge part of that, one could argue any component put on a device strictly for aesthetic appeal is "useless." Yet, in many cases, this "useless" component is strictly necessary for a successful design. (Ie, one that people actually use.)
For something you wear on your face, Glass screams out that it was under-designed. Humans are hardwired to prefer symmetric human faces, studies have shown this. So why would you design a device you wear on your face to be asymmetric? Seems obvious.
People walked into bars and clubs with these. Then bouncers kicked them off.
If people use your product and they are labelled assholes, clearly you have not done market research.
Apple would have made it aesthetic as hell before a rumour even got out.