Something not quite right about that car...
The tail lights are misaligned and the trunk looks, well open

!
Also, the wheels look awfully like my 325's. Aren't those already available for the current gen 5?
It looks better, I agree, than earlier CGI's. But I think that it's still only that....
Interesting that the spy shots show the E60's trunk and front completely hooded. So much so, you can't really make out any details. Is that typical for tester cars?