Basically the system is a 45 degree angled photo of any area of the earth overlayed onto its mappoint maps; this could be an interesting system but is it just Microsoft keeping up with Googles 'Google Map' service?
http://www.betanews.com/article/MS_Preps_Virtual_Earth_Mapping_Service/1116963004
http://www.betanews.com/article/MS_Preps_Virtual_Earth_Mapping_Service/1116963004