Yeah I think the thesis of this thread is flawed. Chipmusic, I strongly believe, is a genre. It has been mischaracterized as a methodology. We can talk about the strength of working with limitations, or cool hacking stuff, but these are two separate things. I believe that the term 'chiptune' arose from the amiga tracker scene, where people were trying to emulate the sound of Commodore 64s, and stuff like that. . Amiga itself was a PCM based sound device, which is definitely not 'chiptune.' If we say that Amiga songs are chiptune, than we have to call early hardcore, like nasenbluten, chiptune. Which would be weird.
So, TL;DR, chip music is simply a genre that attempts to sound like early computer music. And no intelligent person can disagree.