Earlier quoted context omitted.
Surely the device just has a screenshot function?
Two interesting and unrelated facts: A screenshot would be blurry because of the foveated rendering The device doesn't even have a power button
Not having buttons obviously doesn't prevent there being a screenshot function, just as lack of screenshot button on iPhone hasn't prevented it from taking screenshots, and just as the VP's lack of buttons doesn't prevent users from interacting with it at all...