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"Portable players and modern cellphones store entertainment files in memory cards. They often have built-in Bluetooth or WiFi, too, for wireless downloading. Big files, such as a movie, take a long time to capture, so Disney will break the file into several segments that can be downloaded separately and spliced together by the player.
"When the owner buys a meal they get an electronic code that authorises a partial download. If the file is in five parts, then there is a strong incentive to come back for four more meals.
"In the future, a dedicated player sold or even given away by the restaurant could help the scheme to run more smoothly -- and create a new market opportunity for electronics companies."
via New Scientist