DAMN DAT UNREAL ENGINE 4 IS FUCKING PRETTY!! Unreal shows off there new engine called "Elemental". The short film depicts an ancient knight creaking to supernatural life while a decrepit castle comes apart around him. According to Epic, games running on Unreal Engine 4 won't ship until sometime in 2013 at earliest. Its running in 1080p on a PC built from off-the-shelf parts. This is the future of…