Basically this thread has discussed how there really isnt all that much difference behind the quality of audio/video that would be available on these two formats. So its the marketing departments of each of these two formats (or the companies behind the formats) job to market their product in such a way that you say to your self, my current dvds arent good enough i need these new ones, or at least say all my new movies should take advantage of this new format cause its that much better, even if it really isnt.
Mind you, people like us who know whats going on, and know the difference arent as easily fooled by this, but the majority of the consumers will buy stuff because the marketing convinces them that they need it or it is a superior product.
Not to get into much detail but two quick examples. The pet rock. Did anybody need this? was there even a demand of the consumer for this to be 'developed'? no, but it still sold millions. Second. PC vs Mac. They are both computers, they can essentially both handle the same tasks (i said not getting into much detail) but PC's were marketed better and therefore most people use PC's. Mac took a niche hold of the market. This is also true with the ipod, other music players came out before the ipod, were they as good or better? possilby, but Apple destroyed them as far as marketing went and now holds the market.
so strayed a little off topic, but i think the point is there.
-Darth Simon