Homework for people who say BD is not a noticeable upgrade from DVD: go play a game at as close as possible to 720x480 then play the same game at 1920x1080 and come back and tell us if you noticed the difference. Unbelievable...
that's not the same thing though. games start off with low textures and objects and have simple objects that are built up mathematically by the video card. Blue ray vs DVD is simply a matter of compression of the original picture. the difference is going to be far more with video game because it will now contain more detail. the video simply losses more of the original picture (the fidelity for lack of a better word)