I'd just like to say that a full blown RPG with DMC4 like gameplay is a sort of game I've been waiting for, for years. So hell yeah.
The only thing that worries me is that Nathaniel seems to be saying that you can play the game with a console interface or a PC interface, thus having a radically different gameplay experience. I mean when I was playing DMC4 (on the PC) I was using a gamepad, which enabled the best control of the characters. On the other hand, when I play a PC action RPG, really, the only way to have a smooth experience is with a mouse and keyboard.
So my point is that if you're going to accommodate two radically different gameplay experiences in the same game one of them is very likely to suffer. Assuage my concerns quickly, Nathaniel. Please.