The 2020 election, according to many pundits, was going to be decided by suburban voters.
The data above appears to follow the patterns from the last few elections. Cities go for Democrats. Rural areas and exurbs go for Republicans. The suburbs are contested ground. The splits are bigger in the table above: 9% advantage for Trump in small city or rural areas, 23% advantage for Biden in cities. And the suburbs are close with just a 3% gap.
Going even further, the suburbs of the true battleground states may be home to the truly important voters. In this election, the residents outside Atlanta, Charlotte, Raleigh-Durham, Cleveland, Columbus, Cincinnati, Pittsburgh, Philadelphia, Detroit, Grand Rapids, Milwaukee, Minneapolis, Phoenix and more might have just decided the election. That national 3% difference might not seem like much but it could matter a lot when state races are tight.
I am sure there will be more fine-grained analysis of the suburban vote by itself as well in comparisons to other demographic factors that influenced vote totals. But, this early data seems to suggest suburban voters will continue to be important in coming elections.