As an app developer, I'm super excited about the announcement of the public API. I'm definitely going to be taking advantage - I'm going to make a multiplayer companion, using which you'll be able to see a breakdown of your stats, compare them to friends and view your Spartan. I'm also going to include custom map showcases, because community-made maps are some of the the best out there!
If only Halo 5 will allow you to track how many of the infamous "Brace, Large" pieces all forgers have placed compared to every other object in the forge... In all seriousness though, if obtaining actual forge stats through the API (such as time spent forging, # of objects placed, which objects you and your friends use most, etc.), that would be pretty damn neat.
@Buddy Jumps That might be quite good actually I mean their mobile site needs a bit of work but I would actually love to make that app