There is a video in the link that explains further about slavery and the project.
It’s easy to forget about the painful yet important parts of American history when we can’t see them. By immersing ourselves in the places where enslaved communities once lived, we are confronted with a history that cannot be ignored. So to virtually preserve these living spaces and give people access to them, we [Google] created custom Street View imagery for tours of a dozen slave dwellings throughout Virginia, which date from the late 1700s to the mid 1800s.
The Street View tours also play a role in virtual preservation. Many of the dwellings are in poor condition—even in worse shape than when we started photographing them a few years ago. By creating the virtual tours, we preserve the dwellings for future generations.
For the tours, we consciously chose a range of dwelling types and locations to highlight how ubiquitous slavery was throughout Virginia—from the Eastern Shore to Mecklenburg County. People tend to think that enslaved people only lived on rural plantations. But we have tours of slave dwellings in urban cities like Alexandria and Richmond, which challenge the stereotypes of how enslaved people lived.
In school, I explored the usefulness of digital exhibitions. Short of visiting so many places worldwide, photography of these places allows us to “visit” them.
The immersive experience that visiting a physical space provides is lost when viewed through a screen, but with immersive Virtual Reality coming up, sights, sounds and eventually touch and smells (4 out of 5 senses) will bring the immersive-ness to anyone in the world.