If discs are going to be able to store this much information then we could use them to do DVR type of functionality couldn't we? That would hold a lot more than a hard drive be a lot cheaper. Many of these shows could be stored on one of these and you could access the different shows (files) off of that. If a hard drive fails you still have your shows. The hard drive could still be used for pausing, fast forward, rewind live/delayed functionality. One of these discs could be used for VOD. If files could be transmitted through the satellite in a compressed file to the receiver and record that content on such discs and uncompressed to be viewed then a LOT of content could be accessed by satellite (just like zipping a file then unzipping it).
I wonder what all the possibilities of such a large disc would be? One could hold some very large programs on it, a lot of HD shows/movies even.