digital foundry also have a video of it.
I totally forgot about them doing that huge boost. Is that live for all versions? I only currently own a Wii U copy of the game and haven't touched it in a while.
No this one is a mod, also you need a beefy PC a real beefy one if you want to get 60FPS. The 4k update is still in development but most in the community seem to not to care because this ray tracing mod is so much better. the DF video: https://www.youtube.com/watch?v=5jD0mELZPD8
edit: with the latest 1.14 update they added a texture update. Some textures like glass look so much better.