Regarding your suggestion: are you aware of EdgePeek mode (press mouse wheel)? With EdgePeek the view temporarily switches to a cinema like view, which is quite useful for using inventory screens/menus or watching cutscenes. Maybe that is already what you have in mind.
Yes, i am aware of that feature and it’s great. However, i had situations where it would be beneficial to have the headtracking temporarily disabled. I just thought it’s strange there is no shortcut for the Virtual Cinema Mode, but for everything else. It’s not that important though. Just a suggestion.