Wow, i didnt think it would be so bad of an example. You're comparing a 1981 movie with a 2001 movie. Guess which one will look better on any medium?
And frankly, that 'Hi-Def' shot of the Matrix looks no different than the SD DVD on my monitor. So no, I can't guess which is which.
Again, The first two shots look like SD DVD's, and the Iron Man shot you chose looks like its from youtube or something. Meaning that is most definitely not representative of dvd quality
There is no way anything at 720x480 resolution can look as good as stuff at 1920x1080, unless you have really bad eyesight, a puny monitor, or sit excessively far away from your screen.
The Chariots of Fire shot is from the DVD, and the Iron Man shot is from the 480p "HD" trailer from apple.com. That's what standard DVDs look like on big HD TVs. Seriously, standard DVD looks like crap.