Originally Posted by
KenV
You appear to have gotten that backwards. The 777X cockpit is based on the 787 cockpit. The 777X wing is quite different from 787 wing and is designed and built in Seattle, unlike 787 wing which is Japanese.
To elaborate a bit, Boeing is actually grafting the 787 flight deck (Section 41 in Boeing lingo) onto the 777X (in much the same way the 767 flight deck was used on the original 777). I suspect there will be some changes to improve commonality of the 'X' flight deck with the original, but make no mistake, it's a 787 flight deck.