As to the origin of the icon, it was a modernization of the original icon developed by Susan Kane with the Mac... back in 1984... to indicate a friendly computer with a personality.
Jonny Ives updated it with the release of the iMac. The rectangle represents the screen of the original Mac and it retains the smiling face of the personality of the Mac computer.
Not intended to start anything other than finding out the origin of the icon, which you and a few others have mentioned. Mission accomplished. Not really pointless, fun fun factoid type of vanity post. What’s wrong with that?
What prompted me to post this was I was checking out a tracking number on UPS.com and they have the Mac smiling icon, so it made me curious, and I figured if anyone would know the story behind that smiling art deco icon it would be Sword or anti-republicrat