The differences between high laptop and PC are negligible, I've found. You're right, though, it looks so good on PC.... Although, to be fair, the PS3 had pretty good looks, too. I was reasonably surprised.
I was quite pleasantly surprised, actually. I was expecting there to be more of a difference. The few things I did notice did bother me, though. I don't like how the PS3 version has these random pixels due to the lack of anti-aliasing. The shadows at times looked a bit funny, but other than that, I couldn't see much of a difference. That being said, I'm still playing on a PC. Higher graphics and the fact that I could never play a MMO with a controller does it in for me. Plus, I RP, so I'mma need dat keyboard.