Why? Because Ninja Theory's just confirmed that their divisive Devil May Cry reboot, DmC, will run on the Unreal Engine. You know, the licensed engine that's resulted in a number of unstable and graphically flakey releases this generation.
Why is it such a big deal for fans? Because Devil May Cry as a gameplay experience requires a stable frame-rate and fast controller inputs. The Unreal Engine struggles with both — specifically in reaching a 60FPS frame-rate which is so pivotal to Devil May Cry's style.
It had been assumed that Ninja Theory would use Capcom's proprietary MT Framework engine, but alas that's not to be the case. Ninja Theory have proved they have a handle on the Unreal Engine with Enslaved — that title looks spectacular. But it does suffer from frame-rate issues and texture pop-in.