... and compact cameras in place of traditional outside rearview mirrors (images appear on flip-up screens located on each side of the instrument cluster)
I beg to differ, I think the minimal "mirrors" looks great. Unfortunately the pictures are not displayed anywhere. The Wed's Sport Lexus has a camera display in cockpit view so I don't know why they didn't do the same for the Infiniti.
On the other hand the Infiniti doesn't have windscreen wipers either, so perhaps it's a concept that never was intended to be driven...