This sounds like a great idea, but I don't believe it. Just returned from HKG on CX via YVR in J Class. Plane was A-340. No power for the laptops at the seats, and crew didn't think it would be available for a long time on this plane.
Even if there were power, my OS is NT4.0, and NT doesn't support USB so it won't work anyway on my system, even if there is eMpower.
I had planned to work on the flight home using the emPower power. Couldn't work at all. Very disappointed. Slept most of the trip instead.