Computers, mobile phones, and TVs all receive signals over radio waves, but they were never designed to share content with one another. So even in college dormitories with blazing broadband speeds and plenty of digitally skilled undergrads, there are some things the kids can't do. A student can't, for example, sit on a sofa in the common room, whip out an iPhone, and use it to browse a stash of photos on a personal computer in his friend's dorm room-much less drag and drop those over to the big TV so everyone can look at them.
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