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Everybody's talking about the new tablet computer Apple is expected to unveil this month. Some say it will save newspapers by giving them a new platform where they can charge for subscriptions. Some say it will destroy cable TV by letting people purchase shows à la carte over the Internet. Some say the tablet is pointless—nobody needs it, and it will be a total flop. But the truth is no one knows how this device will end up being used—not even Apple.
Yes, Steve J...