theodp writes: In purchasing Motorola Mobility, Slate's Farhad Manjoo reports that Google will also come into possesion of one the nation's biggest suppliers of set-top boxes. So, can Google work some of its do-no-evil magic on the loathsome cable box? Don't bet on it, says Manjoo. For one thing, there's no evidence that Google would be very good at remaking the set-top box (Google TV, anyone?). But even if Google managed to dramatically improve set-top boxes, it's doubtful that cable and satellite companies would buy in. First, they'd lose all those ridiculously lucrative cable-box rental fees. More importantly, they'd have to give up control of the main entertainment device in most homes, and with it the opportunity to slow or stymie competing sources for entertainment. After the merger, notes Manjoo, Google could get several billion dollars by selling off Motorola Mobility's set-top-box division — a much surer payday than taking on Big Cable.