BluRay is good, its just way to expensive at the moment. There is a noticeable difference in quality just because of the resolution. I have a 1920x1080 computer monitor and I honestly can't tell the difference between 720p and 1080p. However 720p looks a hell of a lot better than the standard DVD resolution.
Now if you have a HUGE - and I mean HUGE television screen.. 1080P just might be a necessity.
They cost comparable prices to DVDs a couple of years ago.
You ever heard of amazon? Seriously where do you shop?
Plus with netflix you don't even pay that much for bluray.
A computer monitor isn't a good way to evaluate display technology and most people watch shows on a TV that is far larger than a monitor.
What is a huge tv screen? With LCDs as cheap as they are 32" tends to be the bottom screen size.