Definately a lot of potential. Home theater integration would be killer.
My CD changer and receiver have on screen displays via the S-video cord to my ceiling mounted projector. People can browse CD titles and tweak my surround settings from a single remote.
As of yet, my Mac still uses its 1/8-inch stereo mini-jack audio out... Digital Hub My Ass
Its so un-digital that its not worth attaching to the rest of my digital devices. (Yeah I have USB-audio-input on my receiver but its still only stereo/pro-logic sound.)