I don't think that we should take Arizona as being called for Biden. Only AP and Fox have made that call and since then the count has become a lot closer, with the Arizona prepolls paradoxically (c.f. the rest of the US) favouring Trump.
That said, Biden wins in Wisconsin and Michigan make it very hard for Trump to win.
Where we're at with the remaining states:
Arizona: Biden has a healthy lead there but Trump is clawing back with prepolls. Biden lead should be healthy enough but still possible Trump picks it.
Nevada: small Biden lead but mainly prepolls to count. Expected to fall to Biden.
Georgia: Trump up by about 0.7% with only 5% of the vote to count. Most of the remaining votes are in Atlanta (ironically home to the Center for Disease Control), which is very, very Biden-friendly. This will be extremely close but probably just favours Biden
Pennsylvania: Trump's lead has been clawed back realllllly fast now that they're counting prepolls. This is exactly what was predicted to occur (early huge Trump leads that vanish). Given how they're tracking and how Trump did elsewhere, Biden is probably going to win this one.
North Carolina: Trump lead with about 5% left to count. Not entirely clear where the votes are but they're probably late prepolls, which have favoured Biden elsewhere but not by the margins of the early prepolls. Trump likely to retain this one