This seems really simple to do, why doesn't directv make it so that say the hd dvr in the living room has a movie on it and you want to watch it on the receiver in the bedroom, the signal could be sent back out the coax to the actual dish and then back to the other receiver? With cable you can get phone, tv and internet on a singal coax all at the same time so it is possible to send lots of info at once and it seems like a software update could easily do this.