"The bigger things" as being mentioned here quite often, as per my idea, must be something related to the collaboration between d2h and Cisco - bringing new features like Video on demand, over the top, value added services, multi room DVR, cloud DVR etc. using Cisco's Videoscape technology.
D2h are probably busy combing these details right now and are committed to provide an awesome user experience
All these features are definitely being planned to brought keeping an eye on the future market demand (I'm personally excited about VoD and cloud DVR).
But having said that providing remaining HD channels is a present day issue, which needs sorting as well. They need to keep the current user base happy, so that they remain with them to experience all the awesome things that they have planned.