> But now we're getting to fundamental limits. Even if we had the ability to place the atoms however we wanted them, there's an intrinsic limit. You can't make a transistor out of half an atom.

I believe though that limit is well below 18 nm. Last I heard, they'd done a transistor with 1.5nm, and they weren't saying that was the limit. I'm not sure what the magic is with 18nm, but I'd sure like to know.