That is already the complete map, guys. In the preview videos they opened up two sections of that map, the section where Aloy's tribe lives and the section with the old civilisation ruins and the tall neck stomping around. That was already about 1/3 of the complete world. Several previewers also stated that the world is not as big as the world of The Witcher 3 or Skyrim. Still everyone thought it was big enough with lots of stuff to do.
Here's by the way the map included in the collectors Edition. The unraveled part is mostly the two sections we saw in the previews:
Edit: VivekTo was faster.