Maybe this is just my personal bias against even wearing glasses, but to me, this kind of tech isn't viable as long as it requires a wearable at all. I don't even like wearing a watch. Until the projectors are built into the environment itself, like my walls can directly put holograms into the room with me, I won't want to use something like this.

Or I guess if it's some kind of direct brain implant, though there's no way in hell I'm ever voluntarily implanting a Facebook product.