Apple has recently updated its mobile operating system, iOS 6. One of the major changes includes an overhaul of its map app, which has not gone well. You can check out a few examples here: http://theamazingios6maps.tumblr.com/. The current map app is based on data from TomTom, OpenStreetMap, and others. The former app was based on Google Maps.
Despite the current issues, the maps will be an improvement, lightweight, have pleasing cartography, and incorporating data from businesses, etc. Some important features are missing but will be included in the near future. You can also read Apple's response here.