Do you know what the most popular applications on the Web tend to be? That's right. Maps. And the richer and more interactive developers can make their map-based applications, the more useful they become to users.
Say for example that a retailer showcases its different stores on a map at its website but it needs to feature all the different locations as well as their opening times. What this change offers is a Data layer that allows developers to represent all attributes in GeoJSON right on the map and make decisions about what data to display.