About the 4k it is ok, because the interesting part is the density of the pixels in the image, so even if the viewport was reduced way below it is still useful info.
Yeah, I do remember they mentioning about the normal maps at Star Wars demo. Maybe [USER=“4894”]Tim Hobson[/USER] and [USER=“9”]Stephen Ellis[/USER] could get some more details about this for us, because the correct workflow to follow is very important.