Google Earth Pro and Google Maps API Premier customers’ll see new aerial and satellite imagery updates across the world. If you want to do Real Estate research in Portage, Michigan and you’ve Earth Pro 5 installed. You can use historical imagery feature to research imagery dating back to 1950's. For e.g. Engineering firms doing land surveys near McMurdo Station now’ve imagery updates on this point in Antarctica. This allows them to complete better land assessments.
More info: Enterprise blog