I'm just as confused. But yeah, this was definitely edited along the years.
800x600 seems like good "evidence" of this being old, just like that flash exe, but Google Chrome for one didn't exist up until 2008, among several other programs that did take a while to become popular. Krita debuted in 2005, SAI in 2006, Manga Studio was still 4.0 in 2007. And "x64 programs" weren't even a thing back then.