The Showdown: Blu-Ray vs. HD-DVD

Both Blu-Ray and HD-DVD discs enable HDTV reproduction because of their massive storage capacities. Using dual-layer techniques, HD-DVD can store as much as 30 gigabytes of data while a Blu-Ray disc can pack in a whopping 50 gigabytes. In the lab, techies already are working on several-layered discs that could allow more than 100 gigabytes of storage on one disc. That's enough for several HDTV movies, special features and compelling interactive content. Or a content provider could put more than 100 hours of standard-definition quality programming on one DVD. All 180 episodes of Seinfeld on one disc, anyone?

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