Halo 4: Spartan Ops - Episode 6 Chapter 4 Developer Commentary
GameSpot plays through the chapter four, Search and Destroy mission, on the Cyclone map.
to play the devil's advocate:
Why would they bother with a PC version?
Making PC port is SO much extra work with all the debugging and driver compatibility issues, and it's just going to get pirated out into the oblivion anyway.
As an avid PC gamer, I hate myself for saying what I said above, but hey, if I was actually responsible for the finances of the company doing the work, I wouldn't touch a PC version with a 10 ft. pole unless I got a satisfactory answer to the questions above.