once you start watching more BR films and then go back to dvd, you will see a big difference in image quality. it will look blurrier and noway near as sharp.
Its not something u notice straight away, it is something you notice once BR becomes the norm for you.
The best example is Transformers 1+2. When you pop the BR in, you see the Paramount logo and you think wow that is pretty sharp and then you have these separator lines wash over the image turning it into HD and you think "fuck thats sharp".
Certain things like water, fire, dust etc also look a hell of a lot nicer and the navigation is friggin awesome.
I think people keep forgetting, you dont have to just buy BR if you own a BR player. I usually buy most movies on DVD still, but the big blockbusters that are filled with explosions and sfx, those look amazing and worthy of a BR purchase.
Prices may not be great, but I see lots offers where you can pick up 2 for £20, which isnt too bad.