The one place where size and thickness don't matter is when it's a non-portable device.

I'm surprised they haven't yet gone the route of making a hyper thin screen and hiding the actual cpu somewhere else (something akin tot he puck for the Apple Vision display). Hell you could probably do a proprietary wireless signal and have the display be completely detached. (Or existing wifi6 or something?)

The edges of the thin monitor could be actual transparent glass.

Look at that thick base of the iMac. That's where they should put the CPU. Bring back the G4 iMac you cowards!