What loss of DVR functionality??
timeshifting or maybe they called it time warping, you can google it, dish had patented tivo features on their dvr and they were forced to remove them
it's a pretty cool feature too, you can be watching a recorded show and then go to live tv and rewind or record anything that was "buffering", since removing that feature any change off a channel at all and anything that was recording in the buffer is lost, including watching recorded shows