Movies on electronic memory devices would be interesting, indeed. But the first concern of content producers would be copy protection. Surely they would have to use some [EP]ROM chip technology (which may have a slower read speed) and would have to store partially encrypted content with a technology that would rely on a "more or less secret" set of keys, not much different to DVD Video and Blu-ray encryption. At least I am quite sure that the AVCHD media and directory specs are widely compatible to UDF on Blu-ray.
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