• Two answers, really: 1) There are higher density formats being researched now. For example, there's holographic storage in the works by GE. You can read more here but you need to sign up for a free account. To save you the trouble, here's an excerpt: "Data stored using micro-holograms could allow 100 DVDs to fit on one disc within three years. Researchers at General Electric claim to have made a key breakthrough in optical data storage that could lead to commercial discs holding the equivalent of 100 DVDs within three years. The new technology is based on the physics of holograms, which enable information to be packed far more densely than with established recording formats. A new device will be needed to play these discs but this will be compatible with established formats like CDs, DVDs and Blu-ray discs, say the US-based team." 2) I think the importance of removable media, like DVD's and Blu-ray disks will go down over time, as people begin relying on downloadable movies from places like iTunes or NetFlix, and Amazon. Already there are machines like TiVo and others that support this style of video watching today.

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