Im just kind of confused.
PS2 games could be exported to 720p. PC games have been exported to 720p, or near resolutions for ages. I am sure there were a few GC games that were ported to 720p resolutions.
I was just pointing out that 2 of the systems make HD standard, and one doesn't. Weather or not that means anything to you or not, is entirely upto you. I don't see where many were saying "but the Wii doesn't do HD!" atleast on these forums.
Back from the dead, I'm afraid.