Does it really matter? However nice that trailer was (and it certainly was nice) it's obviously going to be at least "slightly nicer" on the PC regardless. So yep, it looked great, the PC version will look slightly nicer again (at least).
Yes. The comment was in reply that he "implied" that the trailer looks nicer because it was running on the PC, and not PS4 (which isn't the case).
As far as the PC version, one would hope its nicer looking. As of now, the console versions (IQ wise) looks dated from June 2013 material, IMHO.