The expo floor of GDC is abuzz over the tech demo of Epic Games' Unreal Engine 3 (we had a tough time climbing over all the jawbones piled up around their booth). The potential on display in this engine, which powers countless upcoming games from Gears of War 3 to Batman: Arkham City, is staggering. Along with NVidia’s APEX clothing tools, the demo is a blistering visual tornado: depth of field, motion blur, pores (you know, those things on your face? They rendered some of them just to give a sense of the level of detail the engine can handle), neon glows on rainy streets, and trench coats that don’t stick to your legs. The environments presented seem to go on forever. Unreal Engine 3 is more real than reality. With this, who needs 3D?