The unions may well be super-motivated, but they have no control over which lever is pulled once behind the curtain. Private union households here in WI are far more supportive of Walker than may be expected and public union employees in WI are already (in one case 50% of its members) declining paycheck deductions for their unions.
It may well end up being one of two big stories when Walker is victorious:
1. The silent majority has been waiting for the vote.
2. Union household will show far more support for Walker in the election than assumed.
I don't think pollsters and the news media have fully caught onto the fact that some conservatives (like me) simply refuse to participate in telephone polling. I find polls incredibly biased and don't wish to participate (besides the fact that I can't be sure of who is calling and what use they might make of my information). So I hope its a Walker landslide.