Apple has been making notebooks that hinge at the very back of the machine. If the hinge for the display is slightly forward then the back of the machine can be as thick as the entire thickness of the base and display when closed. This would the same amount of thicknessif not moreto mount all the typical ports along the back of the machine.
Or
Instead of placing the ports straight in the side, like we are used to, Apple could put them on the lower-back of the display so when the display is up the cables are running out the back perpendicular to the open display.
Or
Instead of placing the ports straight in the side, like we are used to, Apple could put them on the lower-back of the display so when the display is up the cables are running out the back perpendicular to the open display.