I remember playing Mario 64 at my grandparent's house when it first came out. My grandpa, who was born in the 1920s, was absolutely stunned. He said, "this is a video game?!" and then just sat and watched me play.
Haha that’s awesome. I remember playing a racing game on the Sega Saturn as a kid and thinking it was so insanely realistic and there was no way that graphics could get any better.