[ortusdux]

I wonder if you could sandwich two polarized lenses in a way that would make it only transparent when your eye is in the correct position. Would make for an elegant & simple WYSIWYG viewfinder.

[russdill]

I would argue for some form of head tracking to always display the appropriate frame.

It would be nice if you could use hud display tech so it would automatically track, but I don't think it's possible in this form factor

[efskap]

Maybe even an off-the-shelf microlouver privacy screen protector?