He's most likely spending all this time trying to prepare for the debate.
At this stage in the game and the current political climate, there's probably only a handful of people that don't know how they are going to vote come November. The other 99.965% of the voters, I bet, are pretty locked in at this point.
Maybe he'll get lucky and convince a couple of voters to head to the polls instead of staying home on election.
If biden shows up without a walker and doesn't drool on himself during the debate, the media will declare him the winner and completely competent to occupy the White House.