There are quite a few such other projects, e.g. Streets of Prague (https://beta.streetsofprague.com/), were one can explore Prague in a top-down GTA2-like mode, based on real data.
he recently published his ai slop and it's basically a google earth running on open source maps with fake traffic drawn on the streets.
looks impressive, until you zoom on your location and look out the window and compare what's on the screen vs real life