Romney did what he should've been doing all along. From the Charlotte Observer editorial:
This wasn't the 47 percent guy, stumbling from one gaffe into another. It wasn't the candidate who made independents uneasy by giving himself up to the extremes of his party. The Mitt Romney that debated Wednesday night was the nominee moderates in each party hoped for long ago. He won the debate in a rout.
Is it going to make a difference with the electoral college? Probably not.