ARKit
The Wingnut AR demo that Apple showed during WWDC featuring the Unreal Engine was just mindblowing! Thankfully, it's available on Unreal's Youtube channel so you can still watch if you don't have Safari or the app - <a href="https://www.youtube.com/watch?v=S14AVwaBF-Y" rel="nofollow">https://www.youtube.com/watch?v=S14AVwaBF-Y</a>