This just shows what a Nintendo fangirl I really am, but if it wasn't for Shigeru Myamoto, there might not even *be* a Nintendo, the games and characters might not still be loved by many people today, and when he's gone they won't have his "magic" anymore, just like Walt Disney or Jim Henson.
He's around 64 now, but you never know. It wouldn't be so bad if he just retires, and he has two children so maybe at least of them has inherited his "gift".
One time I even tried to draw a picture of Mario mourning him and holding his monogrammed red hat to his chest in respect, but I had to stop because it was too sad.