Completely cover the gear on top of the cabinet and install a mini camera that captures the displays. Wire the camera to the plasma then your client can pull up the display in pip (pending plasma) They won't even have to turn their heads... Should work.
Just joking...couldn't resist.
Sounds like maybe a cabinet modification may be a reasonable alternative so that all the gear is hidden, then again they won't be able to read the display.
Just curious, why do they want to be able to read the display?
CMack