If Romney wins, expect him to go back to his RINO roots and work hand in hand with Harry Reid and the Senate Dem majority and point and laugh at the House. He never has been and never will be a true conservative.
On another note, unless Obama can be stopped in Pennsylvania, Ohio and Wisconsin, this conjecture is simply academic.
We sometimes as conservatives fall for the liberal logic that one man, or one government, can solve all our ills. I think we shouldn't expect anyone, even another Reagan to wave their magic wand and make jobs appear.
All Romney can do really is stand out of the way the best he can and let the private sector work out the kinks in the economy. Sadly we have spent all the Bush and Obama years building in moral hazard to our largest institutions that they have no incentive to behave in rationally economic manner.
If Romney stands out of the way and gives signals that there will be no more bail outs that will be a great start, but it takes times even for good policy to start working.