I don't think anyone said that at all. Sounds like the opposite of Blow's platform agnostic philosophy. He's only on PS4 first because Sony approached him and he can afford to make it for PS4 in addition to PC.
I don't think he completely ruled out it ever coming to xbox, he said the timed exclusivity deal was a formality that he had to sign to be part of the PS4 show, but that the game would be console exclusive to PS4 anyway even without that bit of paper.