High resolution textures, higher render distance, better LOD quality, reflection and specular light tweaks.
The japanese carrier is using the same texture sets, so both of them are updated.
(Not everything is updated, just the sides and some other textures)
Also a newer video about a newer build:
Some things you see in the video is already outdated, for example vegetation textures are updated compared to this.
Really cool
Those textures are looking "shipshape" xD