My teenagers use Snapchat regularly, and Snap Maps seem to be the "killer app" for them. It allows them to see which of their friends are around when they travel or are out and about on the weekends.
Instead of a feed of stories in an order being able to see thumbnails of stories over a map and clicking around the map would be far more engaging for me.
It would also help me alot as a digital nomad/traveller as it would very quickly let me know which friends are in which cities/countries, as opposed to just the same street as others have suggested.
Similarly if you want to know what XXX bar or street is like right now you could see public stories from there.
Just landed in a city? Browse the Instagram map to get an idea which streets are party to visit/avoid or see random pics of food and think fuck let's go there.
I wonder if this is possible via the API?
Protip: for those not looking for their own friends specifically, you can/could use snapmaps without a snapchat account, just in your browser and see the feed of whats happening in the heatmap.