Right, I think @beschizza misspoke. This wasn't written for laypersons of the technology.
Er, the page wasn't written for nontechnical laypersons.
From the page:
"Fair warning: the 'target audience' for this writeup is people who may not be overly familiar with CGA, and/or come from other demo platforms."
In other words, the target audience is for those who are at least somewhat familiar with CGA. This isn't for laypersons who've never heard of it before.
That said, @beschizza, if you'd like to translate the info into something that laypersons can grasp, that'd be great!