Blue Ray
As a consumer I have to ask, “What is in it for me”? Denser storage. About double what you can store on a normal DVD. Okay, next question is, “Why do I need that”? So you can view HD movies on your HD TV. I don’t have an HD TV. I don’t want to spend significant money on something I really don’t need. I suspect I don’t need blue ray for the same reason. Improving picture quality cannot be appreciated if it is applied to the same mediocre programming. Forcing consumers pay extra for something of questionable value is a very poor business plan. This is particularly true when cost conscious consumers are involved.
My humble opinion is that increased storage and/or higher definition is not justified by its current cost.