My guess would be: More groupthink, less bandwagon.
That is, comments that (intentionally or not) pander to the audience will get more upvotes, but good comments that happen to get several early upvotes won't get the same pile-on effect. That's just a WAG, though.
One thing I do notice: I'm already much less frustrated at comments I'm reading here. If somebody says something I disagree with, I can't see if half the site has voted them up, to me it's just a typical comment that I can either ignore or respond to.
Similarly, now dcurtis and I are arguing upthread, and I'm not anxiously wondering if he's been voted up more than me. We're just in a normal argument where neither of us will be proved by the community to be "more" right than the other. That's good.
