I thought I was seeing things when I compared the nav/idrive screen in the brochure & BMWUSA's site with the actual E70's that I looked at last week at my local dealer.
The nav/idrive screen in the new e70 brochure & on BMW's site shows a screen that looks identical to the 750i's screen....very wide. The actual screen that they are shipping with new e70's is about the same size as the current E53's screen. (Narrow)

(E70 Catalog & BMWUSA website)

(Actual E70)
Just 1 more reason to wait a while, to get what is advertised