When I saw Avengers Age of Ultron last month, there was a huge Xbox / Witcher 3 ad. If you didn't know better, you could assume it was an Xbox only game.
And developers and publishers surely must have an incentive to show the game at it's best. To be fair to CDPR their PCs have been equipped with 980s but not some crazy water-cooled overclocked SLI setup. For consoles, they may want the slightly sharper 1080p visuals of the PS4.
I think if the Xbox One version was scaled back, like the lack of vegetation in GTA V for example, I think those few who'd played the Xbox One version (and who must have seen tons of PC footage to notice a lack of vegetation) would have commented on this by now. As far as I'm concerned no news is goods news.
I like the logic. I supposed they are trying to refine as much as possible. But there really is only 13 days left until launch. That's not enough time to certify much of anything - but perhaps we will see something soon. Those review copies did go out already so I suppose no news is good news, but it could just be review embargoes as well.