The PC version is a last gen port, separated by more then a few graphical differences. People that have played PS3 and PS4 version have stated a clear difference. While we have no PC version to play to compare, I have been around long enough to expect the worse. PC video clips are out, and it doesn't look promising.
The graphics don't concern me, the animations and things of that nature do. Add to this no PC demo for two years running due to bogus nonsense "hacking" excuses and I would say they are treating PC users very poorly.
Their actions say they couldn't care less about the PC crowd. I have a PS4 and haven't even thought about downloading the demo. It's either a quality experience on the PC or nothing.