Is cable TV about to go the way of UHF? Data culled by the Pew Research Center estimates that 22 percent of American adults have cut back or canceled cable within the past year, and within that group, 32 percent have connected their computers to their TVs to view Web video. Not surprisingly, cable TV providers such as Cablevision and Comcast have begun to take notice, and are rolling out their own online video services in response.

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