There is a hypocrisy in video game culture whereby purposefully 'retro' styled aesthetics are lauded and loved (see Strafe, Back In 1995, Hotline Miami) but legitimately old games are forgotten and unplayed. With each successive console generation, another canon of video games gets vicariously binned. When was the last time you played something from the PlayStation, the N64 or even the PS2? Now compare that to the last time you watched an old movie.
It could be claimed that the way games are disposed of is a by-product of their relationship to technology, and the way that both contemporary graphics and a smoothness of experience, in line with standards of the modern day, are considered important by developers, reviewers and players. But then plenty of films with dated special effects survive the test of time. People still watch Battlestar Galactica, Buffy The Vampire Slayer, Star Trek. We're not that fickle. So why don't we care to preserve video games?