The specification for TL51 discs had been approved by the DVD Forum back in September.

 

Final approval for triple layer 51GB HD DVD media has received the green light from the DVD Forum. TL51 is now part of the official HD DVD specification. No announcements have been made regarding content or hardware, but look for Toshiba and HD DVD publishing studios to begin using the new format soon.

 

The Blu Ray camp has used it's storage capacity advantage as one of their bullet points on why Blu Ray is superior to HD DVD. As of November 15, HD DVD can boast that HD DVD has superior storage capacity, in addition to better interactivity and cheaper hardware.