lol the females in my house know the difference and prefer HD, as hard as that is to imagine.
My Mother is a total technophobe, and although she understands that I love my toys, she doesn't always "get it"
When I first got my PS3 and 40w2000, she was gobsmacked when I put a bluray on, and saw the immediate difference. On the projector, of course it's even more night and day. I find upscaled DVDs look fine, I'm not saying they're unwatchable, but bluray adds almost a 3D effect to the film.
Things that are close up are pretty sharp and look good.
As you go into the background though, DVDs show their lack of definition. IT looks almost as though it's focus, the further back you go, the less you can see. Put a bluray on, and you can see right back into the difference. Any panoramic shots just look stunning. Even after over a year of buying blurays, I still get wowwed by it.
I also had a girl back here one evening (but less about that) and when she saw my set up, she said that she thought this whole High Definition thing was a "load of bunkum"
We watched a film. She was stunned. She even noticed during the film that the little things, like writing on a wall, and other little details were all visible, which you'd normally not see on DVD.
Hell, my Mother even wanted to go back to my Step-Father, and ask if they could get the kit to get HD... what a turnaround
As has been mentioned in the past, a lot of it is to do with screen size/quality.
On a 20" monitor, you really aren't going to get a massive amount of benefit.
Hell, on a PC screen, 350mb Divx files still look pretty good. Put them on a bigger display though, and you really see how lacking they are.
I do personally find bluray to be a lot better than DVD. That's not to say DVD suddenly becomes carp and unwatchable, but I do notice when I put a DVD on, the lack of detail in the background, and those panoramic shots just lack depth, and that wow factor.
Vin.