It's not intended as a fashion accessory. But neither were smartphones.

A co-worker had a Newton in 1994. We all thought it was the dorkiest thing we ever saw - him holding and looking at that thing. Little did we know.

I’d argue that if you wear it, especially in a highly visible location like over your eyes, then it is a fashion accessory. Like a hat or glasses it may serve a purpose but that doesn’t negate the need for it to look good.

Fashion will be vastly more important for mixed reality than it is for smart phones. A smart phone is more akin to a watch, fashion wise. You usually only see it when it’s being used. Mixed reality devices will be visible all the time and they will also mediate our social interactions with others.

I expect that there will be only half a dozen different models. They will all be bland and black. But to you point, they will support fashion accessories. Sort of like fashion smartphone cases. Some people will be fine with bland and black.

Don’t forget that reverse pass through may be a thing so you might have a screen on the outside which opens up all kinds of possibilities.