Well in the farther future, maybe TV's will stop taking analog, but the 2009 change over is over blown. The Tv you have now will work just fine if you have cable. It's just people with rabbit ears that are screwed as those signals will stop. Cable now is mostly analog, and your tv will contine to read that signal just fine after the transition.

In the far future, maybe Satellite and Cable will become fully digital and TV producers may change the actual hardware of sets, but hell the newest 1080p HDTV's can still handle atari, NES , etc. I think it'll be a long time till we have problems with them.