I think it accomplished a few things, or at least moved the narrative a bit. I think their overarching goals are nearly impossible in the short span that the word "Occupy" has even been known. Getting money out of politics and fixing inequality was never going to be fixed in a year or two years or even probably a decade. Part of the point of Occupy was just pointing out how ridiculous the whole democratic process, that which we use to fix these things, has become.
As for what they did: They cemented the imagery of the 1%, which I think has helped quite a bit. There isn't a ton you can solidly point to, but I think it's an image that resonates with quite a lot of people regardless of where you stand on the political spectrum. It's a criticism that would still have been probably used against people like Romney, but perhaps not to the extent or effectiveness of what's going on now.
I think it provided a decent counter narrative and grabbed enough news that the tea party's stupid debt and deficit hysteria and the push towards austerity didn't grasp us as a country fully. Obama has been a largely conciliatory president toward the opposition, and I think that the protests and actions exhibited by Occupy had to at least make him think twice about going further right on some issues and perhaps gave him a bit of courage to point out some other issues (things like the Buffett rule). I think it also provides a sort of warning to other democrats about going further right. Yes it's not as concrete as the message and beating the Tea Party has sent to the Republican party, but the democrats would be stupid not to have listened a little. These are the youth that helped put Obama into office, and these are the youth that are politically active and will be growing up and putting more into the system via votes. You could argue that they won't always be so crazy left wing, sure, but they sure aren't going to be tea party-esque people when they get a few years older. It behooves the party to at least take note.
In Wisconsin I think that energy went toward the recall elections. We never got the pure Occupy movement here because of that. I think a lot of the youth were focused on that, but were also empowered in a way by seeing other Occupy movements around the country (and maybe vise versa was also true). Unfortunately, yes, Scott Walker was not recalled, and that does put a damper on things and perhaps discouraged some youth, but it did accomplish some things. I think it put a spotlight on a lot of local issues here, and it did flip a few other seats, so Walker isn't quite as free to put forth more agenda (not that he had much more to put forth anyway).