Add an hour counter, so you know how many hours the projector has been run for.
Allow speaker to be able used as center channel in 5.1 sound system
Add more aspect ratios like zoomed so you can avoid black bars in 16:9. Almost every HDTV has a “zoom” mode to let us expand cinema-format content to fill the height of the screen. Yes, this means we actually cut off the left and right side of the movie, but now the movie is about 33% bigger so it’s much easier to see. And because we’re now filling the entire screen, the black bars naturally go away