Yup I agree with Ryan it's a very expensive luxury to have :-) In my old company we had a few IPads that belonged on the aircraft with a program that had the plates needed. :-)

While not applicable on the 777, it seems like Airbus and Boeing are moving toward forcing built-in EFB's on their new aircraft. All the 787 and A380 cockpits I have seen include a class 3 EFB.

I wouldn't say "forcing" as much as "making standard."  It's easier to standardize and centralize the certification process.  As an example, there's an operator that heavily uses Airbuses that are all RNAV RNP capable.  That came from the factory.  There's another operator that uses a mix of older Boeings in their fleet that are non-RNAV RNP capable.  They did not come from the factory with that capability.  This operator has stated that the older aircraft will not be upgraded, despite their newer Boeings being capable.  Part of the reason is that they don't want to go through the expense, or the hassle.

 

It's a desired upgrade, but it's easier for the end customer if the aircraft gets its certification with that included in that certification, than it is to pay for an STC'd modification, have it installed, and so on.  It's also a marketing point for the manufacturer.