I suppose the current A330s and older 777s used on regional/African flights are showing their age and it is time to look for replacements. I am hoping the 787 wins out - the fact that the 777x will supposedly share cockpit commonality with the 787 can't hurt.
Article below:
Emirates to reconsider Airbus A350 against Boeing 787 - Flights | hotels | frequent flyer | business class - Australian Business Traveller
Unrelated question: does Emirates hire Flydubai pilots or is there a no-poaching rule between the two carriers?