I would be kind of surprised if it didn't, given a lot of other Xbox One exclusive have gone to PC. Ryse, Dead Rising 3, Titanfall, even Project Spark. Even Quantum Break's developer, Remedy, has a history of prodding Microsoft to allow their titles on PC, as they consider the platform pretty important to them as a dev, so odds are pretty even that Quantum Break will eventually go PC. The only full exclusives currently released that aren't directly owned, (IP and all,) by Microsoft and/or developed by first party studios, and/or require Kinect to have much point at all, are Crimson Dragon and D4. (If I'm missing any, feel free to point it out. =D )
Sure, Sunset Overdrive might become the exception, break the habit so to speak, but odds are kind of running against that. o.o Does make me wonder what Insomiac has in mind for the IP, though; they were highly determined to keep it, after all, so I'd be surprised if any series that this spawned remained Xbox exclusive.
Zanten, Doer Of The Things
Unless He Forgets In Which Case Zanten, Forgetter Of The Things
Or He Procrascinates, In Which Case Zanten, Doer Of The Things Later
Or It Involves Moving Furniture, in Which Case Zanten, F*** You.