>>40
Backward compatibility is there, Blu ray and HD-DVD are going to work in windows XP, using a software player, and software player means it can and will be cracked. Also, there's already devices on sale to filter out the HDCP from a HDMI stream (They recieve the stream encrypted and just output it decrypted). And key revocation? As soon as a key of an device that is spread far enoguh has been broken, the system is doomed.