The question is why would they make a trailer on low PC setting ? this better be console version or earlier build otherwise it will be very disappointing, after all this hype and "We're creating the most beautiful looking RPG" claims if they give us a downgraded game then I'll loose trust on CDPR, they promised that they will take full advantage of every platform and their earlier trailers looked like taking full advantage of PC but not this one.
A quick comparison
Geralt (The Witcher 2)
Geralt (The Witcher 3 - Earlier Trailers/Gameplay)
Geralt (The Witcher 3 - New Trailer)
I say even TW2's Geralt looks much better than this, now if you say that it's looking bad because it's terribly compressed and so on then here is a compressed screenshot from earlier trailers
It's clear that even in a compressed screenshot from earlier trailers, his face looks quite detailed compared to this trailer, the scar, the facial hairs and the quality of chain mail are easy to notice.