@NJ5:
I think you are absolutely right. Over here in Europe a movie on Blu-Ray disc usually costs 32€ (!) in a retail store (Amazon: 22€). That's nearly 43$.
In my opinion people won't really buy Blu-Rays as long as the price is so high, especially because - how scottie explained it so well in this thread - the difference between DVD and Blu-Ray is not big enough. Of course the picture quality is totally incomparable but this single improvement can never justify the higher price.
To take full advantage of HD content you need an HDTV. And please don't forget how much Blu-Ray players cost. Altogether a good Blu-Ray experience is still just too expensive for a lot of people, I'm afraid.








