Barnes & Noble might be leaving behind some customers who want a camera and document-editing functions with their tablet. Or the company may have decided it is more profitable to specialize and offer premium viewing from a 7-in. tablet. Tuesday's Nook Video announcement could hint at Barnes & Noble's intent, but it won't be clear until it's known how much a video or a TV show might cost, since Nook Video won't be a subscription service like Amazon offers.
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