The article by 9to5mac refers to sources which has a relation to Apple. It is not expected that their will be major differences to actual map service provides like Google Maps or Microsoft Bing maps. The design should be more clearer and simplified in comparison to current map applications. In the standard settings the 3D mode will be deactivated, but can be activated using a 3D-button.
Even if these are in official information it is very likely that Apple will start their own service based on OpenStreetMap data. In previous times Apple has purchased several companies with expertise within this areas, such as Poly9, Placebase and C3 Technologies.