Faultline has a nice piece on the Blu-Ray standards war, which hinges around competing visions of DRM:
"..."We picture a message popping up on a screen saying something like 'Disney movies won't play on your player any more please call this number for further information.' Or perhaps 'To fix this please call Disney with your credit card,' something like that anyway."
Hilarious stuff - funny that anyone actually believes this has a chance of success.