Audi Nav system has a really useful widget on the display showing how many miles/kms to the next POI along the route you have selected. By way of an example I found it really useful to be able to glance at the screen and see that the next service station was 3 miles away and the one after was 30 miles. This could be used for a variety of POIs and you could go as far to also add fuel/charging points and the prices of fuel at those areas. The key part of this idea though is that it considered the route you are on and so should not include POIs that are not directly on your route.