Gameplay reasons aside, I feel like in real life, it seems like it would be rather tiring to keep your wrist up all the time to use your mobiglas, and it also restricts the use of the screen to a single hand. There are also privacy issues with the use of a large transparent screen. Is there an in-universe reason why this rather unwieldy and awkward form factor become the dominant mode of interfacing with one's digital life, instead of AR glasses, contact lenses, or even direct brain-to-machine interfaces? Thanks!