Six years ago, a handful of broadcasters began talking up the idea of using excess digital spectrum to broadcast programming to mobile devices. In 2010 NBC and Fox joined several TV station groups to form the Mobile Content Venture. But here we sit in the waning days of 2013 and mobile DTV is no closer to fulfilling its early promise than it was in 2010. It’s a lost cause. Broadcasters now need to throw their support behind ATSC 3.0, the new broadcast standard being developed that promises to deliver a signal so rugged that it can be picked up on mobile devices without the deal-breaking external antennas.