Halo 4’s remastered PC version will arrive as part of The Master Chief Collection on November 17, just a week from now.

And that will be the final piece of The Master Chief Collection, which will then consist of: Halo: Reach, Halo: Combat Evolved Anniversary, Halo 2: Anniversary, Halo 3, and Halo 3: ODST, plus Halo 4 (so six games in total).
…
Continue here:
https://www.techradar.com/news/halo-5-guardians-might-not-be-coming-but-at-least-halo-4-remaster-is-imminent-for-pc