The debut video for Epic Games’ next gen engine, Unreal Engine 4, was released last night. The ‘Elemental' tech demo shows off the engine running on a single graphics card (GTX 680) PC. The engine is going to report a lot of platforms, ranging from iPhone to consoles and PCs. Just the other day, Square Enix released a tech demo reel for their next-gen engine, The Luminous Engine. Both are very nice and pretty.