The latest iteration of the Unreal Engine is bound to be popular.
One developer that will "heavily rely" on Unreal Engine 4 is Killer is Dead and Lollipop Chainsaw developer Grasshopper Manufacture. Speaking to Joystiq at E3, Grasshopper CEO Goichi Suda (aka Suda 51) confirmed that the studio will make good use of Epic's next-gen engine:
"As a developer, we're heavily relying right now on Unreal Engine 4. That works really well with both systems – or in the sense that we could go either way."
Grasshopper is also working on a new "stylistic action game" that remains unannounced. It's a new multiplatform effort and chances are, it's being prepped for the PlayStation 4 and Xbox One. The Unreal Engine 4 will likely be on display in that one, so get ready. This particular engine has had its fair share of detractors over the years, but it remains one of the most popular development tools around.