A while ago there was a list of Xbox One X enhanced games, the list consisted of 70-80 different titles of first-party and third-party. There was no Halo 5 on this list which made people thinking, it’s one of the biggest franchise on Xbox. Phil Spencer was talking with 343 industry about some interesting Xbox One X and Halo 5 development. His tweets referred that they are working on 4k patch for the Halo 5.
Just recently 343 posted on their official blog saying that there’s actually something coming very soon. It is the 4k patch for Halo 5 and from what they have been saying they will make this a true 4k game. They did not go into more specific enhancements.
Native 4k resolution is given and because of the fact they are talking about true 4k, they will be including 4k assets as well. That way we will not only get resolution bump but also better looking graphical settings, better shadows, better lighting.
On top of that they also said that more information about it will come in the future because it looks like they are still working on the patch. They must have some success porting to Xbox One X and that is why they are talking about it now and did confirm the 4k improvement however, they are not ready to talk about every single improvement yet.
Just one last information on Halo, apparently they are making all Halo games backwards compatible as well.