Stewart when he is doing anything but not playing music, is Klark Kent, but when I see him playing (In a video or DVD of course) he turns into Superman. Yes, yes, yes.
I don't want to be that literal thinking Stewart is the same personage as Superman of comics.
His personage is just a metaphor or Clark Kent, cause he really is Klark Kent, and not Superman, but he is SuperMusicMan
I hope you can understand my fantasy...