bigboss:Quite possible, prof, but if they could region lock plain DVDs, why not HD DVDs?
Could be the method of unlocking a player but, pure speculation on my part, I suspect the studios were worried if they introduced region locking on HD-DVDs there would have been consumer backlash against the move. Far easier just to support the technology which had region locking already in place and was accepted as part of the technology.
And although it could have been the adult industry which helped, the fact that Toshiba reported they would no longer produce HD-DVD players just a few days / weeks after Warner announced they were only supporting Blu-Ray shows in my opinion that it was the influence of studios and the availability of standard software titles (i.e. films) which decided the battle more than the adult industry on this occasion.