1) For occasions when the bed cover is open, a reflective mirror would need to be in that location anywayWhy? The rear view is up all the time on the screen (maybe only when tonneau is closed?) and local to what you’re looking at onscreen already. Why would showing the rear view way up at the top of the windshield be cool?
Cybertruck’s approach seems different, not worse. It’s certainly cheaper and means less to go wrong.
2) If there's going to be a mirror in that location, making it also one capable of both reflective and digital display makes sense for when the cover is closed
3) As has been pointed out, wanting to see loads you are carrying in the bed isn't possible with the camera display
4) There may be modes of the console screen that don't always display the rear-cam (or you may not want it to if you had another option
5) Many people are used to and/or prefer looking in that location
6) Those dual units are cool.
Speaking of mirrors I saw that the side mirrors on CT are very easily removable (no tools?). What are the chances the wiring harness is there to replace them with cams when the NTSB finally allows that?