Star Wars 1313 looks even more visually stunning than Watch Dogs. For that one, LucasArts is saying only that the game demo is using a heavily-modified Unreal Engine 3 and is running on a PC.
A rep for Epic Games, the company that provides UE3 to studios like Lucas, told me that the version of the Engine that Lucas is using is close to what ran the extraordinary "Samaritan" demo that was shown a year ago at the Game Developers' Conference in San Francisco. That demo, the Epic rep reiterated to me this week, ran on a spec that requires better hardware than we've got in the 360 and PS3 (whether the Wii U could handle it remains an open question; Epic's not saying and we haven't been able to as Nintendo yet). That Samaritan demo was basically Epic's way of suggesting to console manufacturers what kind of hardware power it would be beneficial for them to have in their next consoles.