If a video camera is integrated into a conventional side view mirror housing (that can also fold flat at speed but the camera still works) the camera image can be fed directly to display on the side of the rear view mirror. It would have nothing to do with the cars computer or the center dashboard display and therefore would still work even when the center or driver display screens are being rebooted.
This rear view mirror housing could be wider and slightly taller than normal to accommodate display areas for the side view cameras and still have space for the conventional glass rear view mirror, but without obstructing the drivers vision forward since the X is so tall anyway.
An advantage of showing the side view cameras in the rear view mirror housing is that the camera images will not be washed out by glare. They will always be in the shade of the roof.
I don't think that would cut the drag enough to be worth it though. I really wish they could just get approval for standalone cameras, as that seems like it would be an awesome advancement (especially with the feed elegantly featured on the speedo cluster) - so beautiful: