The new UI allows players to set up their own button configurations, of course. Square says it's been "designed with the traditional Final Fantasy controls in mind to give the game a classic RPG feel, familiar to any PlayStation 3 RPG gamers." So that means you press X to confirm menu items? And use the d-pad to move between them? We've never put that much thought into "traditional Final Fantasy controls."
Square Enix plans to release both the PS3 and PC versions of A Realm Reborn in 2013.