I'm dubious about whether this'll actually be the case. Microsoft needs to convince folks that an Xbox One is worth their money, and releasing it's exclusives to PC hurts that goal. It's not impossible as most consider the PC to be a neutral platform, but I'll have to see Halo 5: Guardians with the PC logo to believe it.
Folks in the know wouldn't talk about something like this on the record, but I've never read this site before. I don' t know how credible they are. Either way, grains of salt and all that.