I think it's going to be close barring a major event.
People tend to revise the history of the 2008 election.
McCain was in
great position until the CDS/banking crisis in September.
I didn't look at the numbers* but from memory, I remember thinking it was a definite possibility that he could win.
Obama won, pretty much going away, because McCain fumbled his way through that financial crisis, including opposing the bailout...and the fact that everyone in the major media wanted him to win.
ETA (looked at some numbers)-*
McCain definitely had seized the lead in a few polls in early September.
1
Just an indication of what I meant. Sept 5th-7th, 2008
USAToday/Gallup - likely voters - McCain was
+10 Granted, that was an anomaly, most of the others had him up by 2-5 or so.