yup!
once your market reaches saturation point. ie. everyone owns several tv's. Then the best way to ensure continued sales is to make the existing kit obsolete, proclaim your new replacement as the better alternative (but don't admit that better is really only for your balance sheet). And then just to make sure people take up the new stuff, stop making the old.
Just go visit your local tv salesroom, see if you can spot any new models with tubes in them and listen to the crap being spouted about how great the pictures on plasma and lcd's are. Then use your eyes and believe what they tell you. I watched a screen for a while in a showroom and was impressed by how much deviousness had been employed in creating a hi-def showreel for these tv's that looked fantastic, until you actually thought about the images being shown.....lots of cgi, very little actual moving "real" images, and absolutely no sideways movement. Very cleverly done to show all the pluses and pretend the negatives didn't exist.
hmmm...i'm getting cynical in my outlook. Must stop thinking to much!