Same reason why DISH creates new receivers with very little difference between them : to make more money and seem to offer more options. For example the 612 hd receiver compared to the 622/722 . The 612 is a single output receiver for one dvr on ONE tv receiver. THE 622/722 dvr is a dual tuner dvr that can be used for two tvs in dual mode and one tv with pip in single mode. Now why do we need another damn receiver for one tv when the 622 /722 dvr can do the exact same thing in single mode? Oh it is about 100.00 cheaper for the 612- MOre options Yay! Now the dish 1000.2 dish is about the same width & height that the dish 1000.4 dish will be , and all you would need is the new triple lnb for the 61.5/72.7/77 sats that could go on the end of the existing dish 1000.2 and a repoint to those sats and you would be in business. BUT NNNNNOOOOO!!!!!! We have to buy another damn dish complete with lnb for another $99.00. The reason is GREED!