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.