The Surface Book 2 sort of did this, most of the computer was behind the screen, the base only had a keyboard, more batteries, and a GPU (which could be disable

The Surface Book 2 sort of did this, most of the computer was behind the screen, the base only had a keyboard, more batteries, and a GPU (which could be disabled so you could detach the screen). It got really hot really fast if you did any graphics/video work on it, even more than regular laptops do.