In ten years time, the real winners in the maintenance/cost scenario may be those airlines that say "screw the IFE, give them power and internet and let the customers worry about it themselves"
In the interim they can supply iPads or more probably cheapish android tablets to those customers that didn't bring their own.
If I was in charge of a big airlines IFE/cabin department I would be looking to move to that sort of system over the next 2-3 years for any new interiors, perhaps combined with a server shoving a couple of hundered films until in flight internet costs reduce.
Fly across the Tasman on Virgin Australia and this is precisely what they do. They have on-board wifi media server that is accessible through an iOS / Android app.
Bring your own device, launch the app, and watch their shows. They can even interrupt it for important announcements.
If you don't have a compatible device then they have some available for rent / included in some price packages.