Amazing...they got the entire plane in 3D modelling and it all fits together......contrast the Airbust 380 fiasco....even the wiring didn't line up.
I guess you confused something - the 787 doesn't exist. I don't guess they had every detail simulated for a virtual roll out. This is a marketing event.
The 787 will be the first Boeing that will follow a more airbus like production process having the key parts manufactured and designed in Japan - there's enough room for delays and problems - since the 787 as the 380 is a revolutionary new concept.