In the photo of Vancouver yaltetown condos (featured at the top of this article) I was able to zoom in on the furthermost apartments and see the paintings hanging on the walls, truly impressive!
The company's site has this to say about potential uses:
"Gigapixel photographs are ideal for tourism, real-estate, architecture,
medical imaging, archiving, and documenting special events. High-resolution
images create the impression of "being there" by immersing the viewer within the
scene. The extreme level of detail captured in a gigapixel image allows
artifacts to be accurately preserved for future generations."
Here is the link to their image gallery and company site: Gigapixel Photography