RF, name a broadcast technology, or mode of transmission, that's ever gone away. NO, analog TV hasn't yet. Some doubt it will in 2009, regardless of the timetable. Will the Democratic congress really want to be held responsible for "turning off Grandma's TV"? Because it's elderly people, people on fixed incomes, those who can't afford, or can't get cable or satellite, who will be impacted most. And let's not forget folks like me, who despite the recent purchase of a 600 dollar antenna/rotor/preamp, CANNOT get a digital signal on Fox over the air (analog reception of Fox 18 in Charlotte, and Fox 8 in High Point are pristine). In fact I can get all networks (admittedly with a snowy picture) with rabbit ears.
I repeat, what broadcast technology, or mode of operation, has EVER gone away? By the way, what bit of recording or audio technology has gone away? Yes, I know vinyl is a minority format. But are you aware that sales of lps have INCREASED each year of the last decade, or that there are TONS of NEW turntables, cartridges, and phono preamps being introduced? You might want to visit an audio store, or seek some statistics before declaring the lp dead. And a HUGE percentage of the music we hear on the radio TO THIS DAY is recorded, and mixed on analog open-reel tape. You assert that so much can change in 20 years. I counter that TRENDS can change and develop over that period of time. Certainly one such trend today is the ascendency of downloaded music, vs. the descendency of the CD...but that doesn't mean either will "go away" in my lifetime, or yours. The BILLIONS of analog lps, and open reel tapes insure that there will be SOME market for devices to play these formats for many decades. Not only that, are you aware that many major record labels have RESUMED releasing on lp?
So please...name a broadcast, or audio technology, or mode, that's "gone away" (alright, the wax cylinder may well be on it's last leg!