They have enough images that it is more than a curiosity (they can do reasonable 3d point clouds of buildings in some ares). They also have quite a lot of software for extracting information from the images.

There is also crowdsourced streetview-like continuous stream of street images, and some code to extract features.

One can use OsmAnd a bit like street view in places where Mapillary images are available.

I had a look but found it doesn't at all work like streetview