Originally Posted by
superangrypenguin
777 refurb have the same system as the 789. the 788 system lacks things like the 3d views, HUD etc.
Edited to add: I'm fairly certain the underlying hardware is different, and not just the software. I'm fairly certain the refurbed 777 and the 789 have the Panasonic EX3 system and the 788 the EX2 system.
I'm pretty sure that the 788 has the ex3 system too, although it may be an earlier version, because of the delays from Boeing delivering the 788s. From what I can tell, the ex2 is an older type screen, that is not as flush to the seat (with the brightness buttons and is more rounded - the system on UA's 772s).