When the World Cup begins in Brazil in two weeks, 3.2 billion people around the world will tune into the tournament, according to FIFA’s estimates. And while many of them will cheer on their team through a high-definition television, some broadcasters will be using the World Cup as an opportunity to test 4K — or ultra-high-definition— television signals. 4K TVs have a resolution that’s about four times higher than regular high-definition sets. Niclas Ericson, director of FIFA’s TV division, told The Wire Report in a phone interview that FIFA is making a 4K...