I think most people instinctively know the economy will either improve, stay the same or become worse no matter who is president. Regardless of this, many people will still vote. People will vote for window dressing- Obama appears to make better window dressing than Romney. Obama should win this election- because he is known and liked better than Romney.
The economy is connected to everything else all domestic and forgien policy issues are connected to economic interest. So again Obama wins.