Nice! It's like taking a stroll through the city across time. With accumulated data, tracking the city's progression from a fixed viewpoint would be even more fascinating.

Awesome.

Any plans to make it global?

I think there is a lot of people who document (urban) landscape and would like to place their photos into map together with the view vector.

OldMapsOnline has a lot of georeferenced old map layers from around the world…