Dreamliner dumped wireless entertainment system, 380 just couldn't get the wiring harness' right. Any 380 flying today or in assembly is probably custom wired - no two alike.
From:http://www.avionnewspaper.com/home/index.cfm?event=displayArticle&ustory_id=545e468b-c60d-4f4f-b626-22d27461edfb
The A380's wiring problems include the wiring of in-flight entertainment, like audio and video signals, to televisions and headphone jacks. Boeing's aircraft, besides claiming to have a fifth as much wiring as the inside of the A380, will use a Wi-Fi system to distribute the entertainment to different people.
This is the first I've heard that the 787 was thinking of using WIFI. Now you say they're dropped that idea? Probably a good idea to NOT use WIFI.