Witcher 2 was a PC fist/consoles later title and I expect the same of Witcher 3. Now the release of W3 might be simultaneous for PCs and consoles this time around but I fully expect them to focus on the PC version first. That's what they've always done at CDPR.
BTW, of all DX9 games.....Witcher 2 still looks absolutely fantastic to this day; it was quite a feat in terms of graphics. Looks better than most DX11 games, actually. So with the addition of DX11 and (likely) PC first development, I expect good things. I do not expect CDPR to downgrade the PC version to make it identical to consoles. It isn't their way. Things could change, of course...but of the devs that I "trust" to deliver the goods, CDPR ranks up there fairly high.