Forza 5 Trailer Has Those Next-Gen Sports Cars, Jesus Rays

Here's the problem with these next-gen consoles, and driving games in particular: as good as this Forza 5 trailer looks, just how much better does it look than Forza 4?


People call them "jesus rays"?
I've heard "god rays", "light shafts", "volumetric lighting" and more...I've never heard "jesus rays"