Well 1st I think HBO has made some changes on their end dealing with MPEG4. As far as CinemaxHD and other Networks Dish might be moving them over on their end to MPEG4. But before you can really take advantage of MPEG4 Dish and the Network or particular channel must also be using MPEG4 on their end. Right now many channels are not on MPEP4 but are in the process of switching to it. So in the long run Dish should be fine but like everyone else you must wait on the Network to get their stuff taking care of as well. 
