Whats wrong with just putting the display below (or above) the lens?
Do you trust someone who won’t look you in the eye when they are talking to you? Putting the display anywhere except directly in front of the lens (behind a beamsplitter) means the on-camera talent can’t look the viewer in the eye. Television (and by extension video production) is mischaracterized as a ‘mass medium’. It is in fact a very personal medium where one person … your talent … is talking to one person … your customer.
