He predicted that Obama would get 50.8% of the popular vote.

Currently Obama stands at 50.3% of the popular vote. However the majority of the currently uncounted ballots are in Oregon and Washington. Therefore Obama's share is likely to go up a smidge.

Still getting the popular vote to within 0.5% is pretty good. Especially considering that many national polls going in were consistently calling for a Romney win there.

He was down by 200k a few minutes ago, now he's only down by 110k. California has about 20 million more votes to count, if Obama takes them 55/45, should be good enough to take the popular vote.

You're forgetting washington DC