The screen is a replica of the one found in most of the F and G generation BMW. I don't think it looks out of place at all, minus maybe the silver surround on the screen itself.
On closer inspection, there is a difference between the Z4 and X3 NAV screen, this doesn't necessarily mean that the cutout is different however.
http://www.realoem.com/bmw/enUS/show...diagId=65_1240
http://www.realoem.com/bmw/enUS/show...diagId=65_1398