The popular vote will be very close. Romney might take it.
I expect that the professional bookies are probably right, though, and Obama will easily get the electoral vote. If it does play this way expect another round of attempts to get rid of the electoral college, which will (unfortunately) go nowhere.
Whoever wins will have no mandate. Unless the legislature changes in a wild and unforseen manner we can expect four more years of partisan obstructionism in Washington. Considering the agendas on both sides that’s probably for the best.