The concept of caching for movies wouldn't account for the WiFi concept of personal phones/iPads/laptops planned for by most major airlines.
More here in another article, there would have to be a massive data stream to cope with 200 pax online at the same time?
Qantas plans to eventually allow people to connect to the system using their own WiFi-enabled devices and has flagged the possibility of letting passengers take home unfinished movies.
The new system could handle the full demand of passengers on the 254-seat 767 and was working as expected, Lufthansa officials said.
"From what we see from the trial, it's all very stable and reliable," said Norbert Muller, head of program management, BoardConnect, Lufthansa Systems. "Obviously, we put a lot of effort into it, from the design perspective, to provide fail-safe measures and different protections to make it (rigorous)."
Using WiFi available from access points around the plane means airlines can avoid the cost and weight penalty involved in installing kilometres of cabling.