Epic Games has released a demo for Unreal Engine 5 for PlayStation 5 and it's truly incredible. The demo comes from the company behind the uber-popular battle royal game Fortnite and previews some seriously mind-blowing, next-level graphics and possible gameplay. Gameplay footage was revealed during the Summer Game Fest livestream event. The Game Awards creator Geoff Keighley posted a brief clip from Epic Games' nine-minute demo on Twitter, captioning the video with, "This. Is. PlayStation 5. In Real Time. And it’s gameplay of a new demo created by @epicgames." The demo, titled "Lumen in …