Biden has taken about 65% of the votes counted on Georgia the last 2 1/2 hours. If that trend continues we're talking about a margin of a few thousand or even a few hundred votes in either direction. Be prepared for a recount.
Interestingly, Biden has won almost 150% of the votes counted the last 2 1/2 hours in Pennsylvania. AP estimated that there were 912,000 votes left to count and Trump was ahead by 266,654. Now there are 856,000 left to count and Trump is ahead by 192,385. I suppose the explanation is that AP got the total number of votes wrong at first but it certainly means that the race there is still wide open.
Edit - Pennsylvania update:
Since I posted this, 0 more votes have been counted in Pennsylvania and Biden has won 1396 of them. That's a rather impressive ∞%.