Looks like power, USB, and networking are inseat. We have not yet taken off so not sure how it will all work. Weirdest us the flight of stairs behind me, to the upper deck.
UPDATE: the RCA plug at the top is a video connector. You can plug in your iPod or video camera or personal media player and watch your stuf on the screen in front of you. Only business class has the audio connectors - go figure! The USB socket could read media from a flashdrive.