The Senate is looking like a nearly sure thing for the Democrats at this point (Thanks Todd Akin!), which means that no matter who wins, Obama or Romney, their only real route to implementing domestic policy will be Executive Order.
Those are fairly easily rescinded. So neither man is likely to have much impact at all on domestic issues in the long run. Nothing is changing there in any permanent sense until you have the moderates back in the Legislature.
Romney practically endorsed Obama on foreign policy, who himself is practically a Bush clone when it comes to foreign policy. So we will see continuity, for better or worse, on foreign policy issues.
I think come Monday, we will know for sure where Romney is going to shake out. But his "momentum", and I use that word sarcastically, hasn't carried him into a winning position in the Electoral College, merely tightened up the race. Between the Obama win in the second, and the tie in the third, no one really has any momentum right now. That means that what we see on Monday will represent pretty much the election day forecast.
I'm not very comfortable predicting a winner, but gun to my head, I'd say Obama is looking like he'll carry Pennsylvania, New Hampshire, Ohio, Nevada, and Wisconsin. He still needs either Iowa or Colorado, IIRC, and that isn't looking that unlikely, while Romney will carry Virginia, North Carolina, and Florida. That would give Romney a good chance of winning the popular vote, but give Obama a slight edge in the Electoral Vote.
I freely admit though, no matter who wins, if the margin IS 273-265 I expect the lawyers to get involved. I also expect that the international monitors are going to be VERY unhappy with both parties when this is done.