The only thing they're updating is the UI afaik, texture and screen resolution are independent so the probability of adding HD textures are low.

A HD texture pack is something that's been requested for quite sometime now, but no answer to the request so far. Even if you're playing at 1080p, or 4k the textures look just as bad. They were were compressed with the mindset that you'd be zoomed out 90% of the time so it isn't really noticeable, which is true in outdoor areas but indoors and on armour it looks awful.