At least for me, it’s the revolution in handheld gaming devices, I played a lot of WWF and lot others with its magnifier and extra speakers!
Some Dot Matrix days were those the only rival Game Boy got is Game Gear and that was a color marvel in its own right but Game Boy got some of its own Charm or just the name Game Boy.
Deviant artist MaboroshiTira really likes Game Boys. So much so that she built a giant cardboard one, I don’t really know for what purpose but it’s still cool. No, it doesn’t work, you can’t play Dragon Warrior 3 on it, but all the buttons are push-able and the on/off switch and volume dial both turn.