I got an email from Dish today asking me to complete a survey regarding 3D which they said was coming later this year (soon???). I answered the survey,of course. Surprised I didn't see any other posts here from others getting the survey.
Actually, back when I had a Quad receiver there were two version of Quad. One was Matrix and one was Discreet, Discreet being "true" 4 channel sound. My receiver played both. The receiver had a built in 8 track and I had Jethro Tull's WarChild in Discreet. It was pretty "awesome" hearing the sounds coming from each speaker. Quadraphonic was the inspiration leading to 5.1, and soon 11.1. Surround Sound - How many speakers needed? - AVS Forum