First of all D* has announced that they are adding more than just locals, in HD. Here is part of their announcement from this past January.
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DIRECTV announced last September plans for a dramatic expansion of local and national HD programming over the next two years via four new Ka-band satellites to support the carriage of 1,500 local and 150 CONUS HDTV channels plus other enhanced services. The satellites are now under construction and two will be launched early this year.
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Their Press release did say that they will be launched by now, but we all know they have had technical problems, with the satellites and launches. It is important that everything work right from the launch, to the implementation of the satellite broadcasts. Putting a satellite into orbit that doesn't work isn't going to do anyone any good, just delay the implementation of entire project even longer. Right now they are limited to bandwidth with their current satellite configuration, and more is needed to add any more HD channels. HD channels take up a lot more bandwidth than regular channels do.
I don't work for D* but have worked in electronics most of my life and know that sometime a major project, like they are undertaking, will have set backs. But I am sure that once everything is in place we will have many more HD signals.
I personally could care less about the local HD stations, I already have mine set up with an antenna, in my attic. I would like to see more nationals. As far as locals, if you have your own antenna you will get first generation OTA broadcast and I am sure it will be better quality than second generation satellite broadcasts.
As far as E*, the only thing different from D* is they have TNT instead of Universal, and the VOOM package. My neighbor has E* and says that VOOM is nothing but the same thing played over and over. I guess that is kind of like Universal and the Olympic Games. I haven't seen any plans for anything from E* for enhancements to their HD channels, like D* has announced.