Did you mean that the next demo is currently 2GB? How big do you expect the full release to be? For the demo, 2GB isn’t that bad; and with 5 guys, if the full release comes to around 10 GB, that’s not too bad either.
I do have a 1080p screen, but the images will work either way so personally I’m not too worried about that.
As for the gallery, I don’t think one is needed for the next Demo, but it’s definitely something that should be in the full release!