That's after they've been compressed for Blu-ray. Buy a HD cam, and see how fast a 2GB card fills up recording at uncompressed 1080p. Granted, the video was most likely compressed as well but not the same as a movie for Blu-ray. Seriously though, outside of the video and gear the only other things that are new to the DLC art wise is the raid and new PVP maps. Everything else is the same areas and enemies we've already seen. All the new ships are going to take up a lot of space alone. The DLC was just code and some new art.