I really think it is a case of, does the average consumer see any benefit to the $$$ outlaid?. In most cases, in my experience, no.
I took my DVD (Pioneer 535) to my brothers house today to watch a movie, and also to see how it compared to his PS2. His wife could not see any difference between the players, or even to a cheap VHS player. Their TV is not SOTA, but I had no trouble at all seeing a large difference between the DVD sources and VHS, nor did my bro'. BTW the Pioneer was better. He would like to get a surround amp and a better DVD, but his wife is dead against the expenditure as she can't see the difference. So what do you reckon his chances are of getting it?
VCR's represented a big advance for people and their viewing pleasure. DVD took that a small step up (beter A+V, but no recording), but not enough for most people to buy one here. HDTV is dead in the water. DVD sales might pick up a fair amount when they can record and are not too much more expensive than a VCR.
Note:Australians are usually one of the countries with the highest take-up rate of new technology.
The people who frequent forums such as this are usually audio/video-'philes, and peak performance is something we strive for. For most people, value, benefit, ease of use and longevity / reliability are more important. Irrespective of the touted benefits of new technologies, manufacturers cannot force them on the public. Blu-ray and HDTV are great ways to get us all to spend lots of money to replace gear that works perfectly adequately for most people, for something that is questionably of imcreased benefit. But it will make the companies bottom line look better wont it?