From Boeing newairplane site:
787 Dreamliner - DREAM)TOUR
Sitting higher than 7,300ft (2,225 meters), Mexico City has always played an integral part in Boeing's flight test programs for high altitude testing. During its time in Mexico City, the 787 Dreamliner will be visited by long-time Boeing customer AeroMexico - the first Latin American carrier to order the Dreamliner.
The Dream Tour airplane, ZA003 is expected to arrive at 15:00 hour local time.
Wonder if there will be an order for more planes.