Actually, I don't think OWS will affect the election or its outcome that much, nor do I think it will hurt Obama's re-election prospects. Here's my reasoning:
1) OWS is unlikely to continue anywhere near the 2012 election (another 12 months?), and as has been proven about 3000 times, Americans have a very short political memory.
2) Obama has not endorsed or even engaged the movement directly. I don't think people associate Obama and OWS except for those who never supported Obama in the first place, so they use a broad brush to paint everything and everyone they disagree with as ideologically the same as Obama
3) Obama already has the moderate ground staked out. The left is not that happy wth him because they think he is not liberal enough, certainly not as liberal as OWS
4) The Republican field is very conservative, and to get the nomination in 2012, they will likely need to continue to campaign as such. This merely makes Obama look like the more moderate alternative.
OWS is significant, don't get me wrong, but I think pigeonholing the movement into being viewed on the same level and in the same manner as the President is inaccurate.