Watched this yesterday and got a bit of a mundane query.
Can somebody explain what the holograms/ghosts were all about, I didn't fully understand them? At first I thought they were either recordings of something that individuals had previously done (e.g. showing people running away from a threat, using the flute/pilot seat etc), or possibly showing what characters would do in the future. But other than serving to educate David on what to do in the pilot seat I wasn't really sure on their purpose or what their true origin was.
edit: Overall feelings about the film weren't great, slow to start but picked up a bit. I didn't like the female lead and don't have particular desire to see any sequels. I think if it wasn't for the Alien connection, I probably wouldn't have watched it.