Since you asked the question, what do I think, then I'm going to tell you what I think. I think they will not replace all 4 receivers. I think they will replace 2 of your receivers at most. You might be asking yourself right now, why, why does this person think that they will only replace 2 and not all 4 of my precious, glorious high definition receivers. The answer is simple, my friend, you are a high definition hog. You are hoarding all the high definition receivers and you are sucking up all the bandwidth and you should not be allowed to do this! You have far too much money to spend on high definition sets and you have no idea where in your house you like to sit and watch tv. You need to slow down, big fella, take up another hobby. Walk your dog. Get out and feel the sunshine on your face, Mr. Rockefeller!