Western culture is increasingly addicted to convenience and over stimulation. As a result "high-end" has become less relevant.
By convenience I mean quick, easy, small, and non-impacting. My daughter downloads and why not? Just pay for the songs you want at $1 each instead of the whole album at $15. Why should she mess with a CD when she can fit thousands of songs on a tiny Nano and gillions on a hard disk? And the sound quality of a Nano it light years ahead of Walkman cassette or CD player. A 55 year old friend who knows I'm into audio and would love to help him pick out stuff just bought a bigger TV and a smaller (Bose) sound system to go with it. He wanted to get rid of the bulk of HT related stuff in his living room. He says it sounds great.

Stimulation can be seen everywhere. Can't drive, read, shower, and even wake up without some kind of background sound. Every major room in our house (except kitchen and dining room) has a TV or stereo in it. One of the results is acclimation to higher background sound levels. A recent study indicates that hospitals are getter 5 dB louder every decade. Precious little "real music" (unamplified) is commonly heard today. Coffee shop performers have to plug in to be heard, live theater performances amplify instead of using the room acoustics and hoping everyone stays quiet. It's so un-cool to not be busy or not be multi-tasking. If you found someone sitting at home doing nothing with no electronics on around them, you'd take them for evaluation. (Starts to sound like 1984 doesn't it?)
The purpose of any music playback system is to recreate the original performance. If the original performance was amplified to start with how do I know what its supposed to sound like? What makes my iPod any worse than PA speakers? And with all the "engineering" done in the studio can anyone define what its "supposed" to sound like anyway?
Folks have always wanted new gadgets, but since the CD audio hasn't provided one. R & D in commercial endevours is driven (as always) by potential profits. Today's cool gadgets are computers, cell phones, and HT. Sharper Image offers audio eye candy that probably attract more sales than all the "high-end" put together.
Conversely tubes and vinyl are seen by the general public as vintage only and not taken seriously as "high-end". They would save them for display at the local historical museum or holiday parade.
In order to "get away from it all" people are moving towards "active lifestyles" (sports, outdoor activities, RV's) instead of hobbies (woodworking, knitting, gardening). Again audio isn't relevant here either.