How long has MPEG-2 been around? I've been a Dish subscriber for 8-1/2 years and I know DirecTV was out before that (quasi-MPEG-2). So, MPEG-2 has been used to deliver Satellite programming for approximately ten years. So, here's MPEG-4 and now we need to upgrade. Fine, but let's make future generations of receivers upgradable! Otherwise, we'll be going through this again after MPEG-x comes along providing 1920x1080i with only 750Kbps.
Time after time, in talking with non-HD adapters (i.e., the general public), the perception is "why buy something today, when it will be cheaper/better/obsoleted tomorrow?" This is the group of people that expect a piece of Consumer Electronics to last 20-30 years. I mean, my Dad has a Sony Trinitron that looks as good today as when he bought it 28 years ago. Likewise, a Yamaha receiver he bought back then works just fine receiving FM and AM broadcasts. Sure, it doesn't understand any kind of Dolby or DTS, or even surrond, for that matter, but it still makes beautiful music (well, HE likes it.)
Dish made the 6000 relatively "future proof" by including upgrade slots. The 921 "should be" upgradable via the PCI slots. As far as I know, no other DBS STB maker does this. Still, if I amortized my receiver purchases over the years ($699 for my first 2000, $799 for the HM-DSR100, $725 for the Dish 6000, and $149 for my 811,) that's about $280/yr., added to the $400-500/yr. for programming. So, obviously, going with Dish has not been about "saving money". But it still hurts to look at this amount and think that it will all be for ca-ca when MPEG-4 is the standard.