Not wishing to take anything away from this cool looking interface, but Google StreetView DOES slide between bubbles when using Google Earth app. Google also captured rough LIDAR data, so there is 3D information which deforms the bubble (so the street is flat, and the buildings pop up). The 3D sensation of moving thru StreetView imagery is very compelling, especially on an immersive vis rig such as LiquidGalaxy. Highly recommended for virtual field trips!
Andrew / eResearch / Uni of Western Sydney