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The TV Everywhere pitch is straightforward: If you pay for cable TV, you can watch cable TV wherever you want — on your iPad, in your bedroom, on your phone, in the airport, etc. The reality is a lot more complicated, for a lot of reasons, but the upshot is that right now you can only watch a bit of what’s on cable on devices that aren’t your TV. And if the cable guys are going to convince people not to cut the cord, or to sign up for the cord in the first place, that’s going to have to get better.