In the early part of 2012, Americans spent an average of 34 hours a week in front of the TV. A small amount of that time was spent playing games and watching DVDs and an increasing number of people watched TV shows they’d previously recorded on a DVR. Still, the lion’s share, 4 hours and 18 minutes a night was devoted to live TV. But according to the latest Nielsen Cross-Platform Report, many of those people weren’t just watching TV, they...