Microsoft has brought back 3D imagery with the new Bing Maps Preview app for Windows 8.1. There are 3D maps of about 70 cities such as Canberra, Australia; Portland, Maine; and Bremen, Germany. The app is optimized for touch and makes Streetside available for those who want to see a map at street level (similar to Google’s Street View). It also has search, traffic info and other functionalities as well as Skype call ability and Open Table integration.