Apple is the first consumer oriented computer company to provide a Unix based OS and, shortly, a Unix based/software based DVD player.
"Illegal" decryption software, such as DeCSS, is Unix and Software based. While as a software person, one may "know" that that makes no difference, to large industries - particularly after Napster and DeCSS litigation - such matters are not lightly assumed without further cautious investigation. I am certain that industry lawyers would be quite interested in ensuring that Apple's DVD player will not be easily converted into an illegal copy and decryption machine.
As for how much or how long such interests might affect Apple's distribution of a Unix based DVD player - I think that is unknown. Clearly Apple is not trying to piss off the industry (Jobs got rich making movies - not computers - movies made on Unix based machines). Maybe people are right to say, the delay would be quite short, if at all, but I wouldn't dispute the liklihood of the concern causing the delay - rather than any technical issues. One thing is clear - creating a simple, Unix based, DVD player should not have been difficult for Apple.
Check out the story posted below, from another posting above. It doesn't mention Apple, but it suggests the challenges the entire entertainment industry is going to go through when broad band becomes ubiquitous. This will not only affect Apple, but your free speech. Moreover, this is NOT matter of national security. It's entertainment.
http://www.wired.com/news/culture/0,1284,42259,00.html