The safety demonstration is mandatory, however, it does not have to include a video presentation. Many airlines still do their safety demonstrations without a video. Many airlines have no video entertainment system onboard.
There is no way airlines are going back to projectors and cabin screens. iPad rental is much more likely. Some airlines offer AC power, some offer USB power, some offer both. Nonsense. A faraday absorbs RF. It does not reflect it.
The weight of the in-seat entertainment systems requires a lot of fuel to fly around. I'm willing to bet that United will strip out all the in-seat video, at least from Economy and Business classes (it might possibly remain in First class) at the same time that they install the streaming system. I agree with the other posters that in-seat power is both important and easy to provide.
A five month wait from announcement to shipping might be plausible if this were the first Apple TV, but it's not. Such a delay following announcement would dry up sales of the current 3rd generation Apple TV, which would make no sense. It's called the Osborne Effect.
There is simply no reason to announce an update before it will be ready to ship. The Mac Pro was an exception because sales of the old model had already dried up and were actually banned in the EU.
It seems more likely that Apple are testing two sizes and will choose one of them to put into production. If Apple will have two sizes of iPhones, the smaller size would almost certainly be the current size.
I could imagine the lineup a year from now being iPhone 6, 5s, and 5. They might keep the iPhone 4 in production for poorer countries like India.
The number of major carriers needed to avoid tacit collusion is probably six to eight. A reduction from four major carriers to three would result in a massive increase in tacit collusion with consumers forced to pay higher prices for worse service. The anti-trust authorities should prohibit any mergers involving any of the big four carriers. If two small (or regional) carriers want to merge, that should be allowed.