@stroughtonsmith This does sound appealing. There's several good options for ~16" screen tablets out there now (the 16" 4k Xencelabs one seems particularly nice), but it's also and iPad and kinda-Mac and comes with Apple fit and finish that sweetens the deal considerably.
The only change I'd make is the Magic Keyboard being just an aluminum "dock" and magnetic iPad flappy bit that snaps onto a regular Mac keyboard. Have never been able to justify iPad MKBs due to their single-device nature.