Microsoft Explains Why Halo: Master Chief Collection Isn't Coming to PC, Doesn't Rule Out a Future PC Release

[Rafie]

Dadrik said:
They want the Xbox One to close the gap with the PS4. They'll need Halo. So that's not really surprising, even though these are remastered editions, it'll sell well.

I wish I had a Xbox One :(

That version of Halo definitely won't close any gap with the PS4. Halo 5 will see a tremendous boost for sure though. That game there may tie things up in North America/U.S.