I mentioned that I would come back to this, and I may yet again. Yes it was that good. I pulled the xBox 360 demo of Bioshock down and ran it through. I can honestly say that yes, it looks a bit better on PC, if you have the hardware. Which is what I've been saying all along. The biggest offender is the textures, which show hints of the pixelation at close inspection. Just visible. Also, I noticed the aliasing on edges a lot more. That may be the fact that I'm playing on such a large display, however.
The game still totally rocks, and when Brian finishes with his copy, I'm grabbing it off him. The controls work quite well, though the hacking mini-game is slightly harder without a mouse.