Warner Brothers announcing that it would no longer support the HD-DVD standard was the big announcement.
This is defined as a discontinued high-density optical disc format for storing data and playback of high-definition video.
At the Consumer Electronics Show in Las Vegas in January 2008, Warner Brothers which were bigger suppliers of HD DVD titles announced it will be discontinued. This therefore shifted the war in Sony's favor and supported the use of Blu-ray.
Read more about Blu-Ray here https://brainly.com/question/3407175