It's a pretty short demo. It looks like HL2 on the 360 (i.e. not very good). The gameplay kind of reminds me of Assassin's Creed in a way. Hack and slash. You get a bow, but the arrows are so rediculously weak that it is better to just charge your enemies and chop off their heads. Maybe it's better when you upgrade your equipment.
I didn't find the visuals that impressive. Perhaps if they used the Assassin's Creed engine, it would have made the world more impressive. As it is, the world looks dull and drab. As much as I didn't care for Assassin's Creed's gameplay, that game did set an expectation for visuals in this game genre. This game is no where near as visually impressive as Assassin's Creed.