Apple engineers and designers, spurred by Mr. Jobs, have been struggling for years to find a new interface for the television. One of the biggest hurdles, according to people with knowledge of the project, has been replacing the television set’s annoying best friend: the awkward and confusing remote control. Apple would give people a way to choose the content on their television that is as easy as choosing the content on their iPod, iPhone or iPad. Alternative remote ideas floated by Apple included a wireless keyboard and mouse, or using an iPod, iPhone or iPad as a remote. None of these concepts worked. But there was one “I finally cracked it” moment, when Apple realized you could just talk to your television.