Well it's inherently bound to the AACS copy protection system. Since HD DVD and Bluray are launching with an interim agreement as far as AACS is concerned (i.e launching without the final spec of AACS) some things - like precisely how it is stored on a computer or portable device - have yet to really be made clear and obviously, no first generation players for either format boast the ability to make copies. Whether they'll be able to do so in future thanks to firmware updates I don't know.