As someone who wears glasses, even the regular glasses is not something one will put one willingly unless there is a real benefit in doing so. In most cases, I will prefer to raise my wrist (the phone actually, I am not a big fan of watches either) a few times per day to wearing the glasses all day long. I can see how the glasses may be useful in some especial cases (MS Hololens comes to mind) but not much else.Seriously? It's obviously useful. The issue has been that it's too unwieldy so far, but once Apple or someone else makes a pair of glasses that is no bigger than ordinary glasses, it will take off like a rocket. It can do everything an apple watch can do, without you even having to raise your wrist.