Cross-qualification
If Boeing does decide to come out with a new variant of our dear friend the 767, it will be important that it has some degree of cockpit commonality with the 777. I feel that Boeing has really missed the mark compared to Airbus by not offering similar cockpit layouts between the 737NG, the 764 and the 777. That being said, I haven't flown either model, so maybe I'm the on off the mark!