I think that is in parts because a few seconds of video material does not really give you a good idea about game play. Even within the 80s, there's a tremendous

I think that is in parts because a few seconds of video material does not really give you a good idea about game play. Even within the 80s, there's a tremendous difference between early games and ones from the end of the decade. It's hard to see but very easy to notice when you actually play the games. Also, the graphics and sound evolved greatly from very simplistic to sophisticated. A lot of programmings tricks have been discovered over the years for the C64 that allowed to push the boundaries of what is possible on the machine.