Halo 4: Forward Unto Dawn opener - data spheres and holograms
I really like the occasional shots of the ship's blinking screens, they do a great job of showing that the desolate ship still has some life in it. It's almost like the faint heart beat of the ship.
It was also interesting to see how the energy swarm was treated. It looks less technical and more organic and it's nice how the lines continue flowing through the body of Cortana.
Make sure you visit the breakdown page on Polynoid's site to check out the level of detail that went into the production of these shots.