Because DirectV will be changing the way that it processes HDTV on its system (converting from a MPEG-2 to a MPEG-4 system), current HDTV receivers will become obsolete because of their inability to tune future DirecTV HD channels. So if you are in the market for one of these it might be a good time to sit back and wait for the newer receivers and newer HD programming to become available first before jumping in. DirecTV will be lauching 4 new satellites over the next two years in order to offer HDTV local channels in the 12 largest markets. The first satellite launch is scheduled for this summer.
If you just recently bought and HDTV receiver for DirectTV you may want to look into unloading it or returning it ASAP. Roughly 500,000 who already own such a system are going to be forced to upgrade both their dish and receivers in order to get all of the MPEG-4 programming. Incentives could be offered for equiptment upgrades, but likely that will involve long term service extensions.