It would have to "dim out" pretty quickly around the main display, so that other knobs and buttons would look pale and as part of the background, and only the display would be clearly visible. I think it would be visually appealing, if done this way, but then of course I could be proven wrong anytime...
I can give it a try when I have some time, but it would be good to know the actual pixels of the whole banner before I start working on it.