In a recent interview, founder and CEO of Epic Games , Tim Sweeny revealed that they will continue to enhance and expand Unreal Engine 3 for years to come and that Unreal Engine 4 will focus on Microsoft and Sony's upcoming consoles.
"The Unreal engine is really tied to a console cycle. We will continue to improve Unreal Engine 3 and add significant new features through the end of this console cycle. So, it is normal to expect that we will add new stuff in 2011 and 2012", said Tim Sweeny. "There is a long life ahead for Unreal Engine 3."
"Version 4 will exclusively target the next console generation, Microsoft's successor for the Xbox 360, Sony's successor for the Playstation 3 - and if Nintendo ships a machine with similar hardware specs, then that also. PCs will follow after that."