Ross Rubin (@rossrubin) contributes Switched On, a column about consumer technology.
At least since the advent of the first camera phones, people have been wondering whether the cell phone would limit the opportunity for all kinds of other products, particularly portable electronics. Even the more pedestrian features of basic cell phones have been blamed for the declines in (or at least limiting the market for) pagers, Family Radio Service (FRS) radios, and even watches. And beyond portable electronics, cordless phones have also been in a state of decline for years as more consumers cut the cord. But the
