Don't we have aerial and satellite view for that? Disclaimer: I don't know if Apple Maps has a satellite view (never owned an Apple device) and I very rarely use Google Maps for navigation so I don't know if those views can be used while navigating.
However I've got the feeling that the new and less detailed maps are made for the use case of navigation, with a voice telling us what to do. Road names are important only when we are discovering what's around us or where we want to go. If this is a less important use case now, street names go away. Still it should be possible to build an app that works on a sensible way in both navigation and discovery mode.
